Plumbing and fuel gas codes by state

The plumbing code and the fuel gas code adopted at state level in the 50 states and the District of Columbia: the model code it is based on, the edition, the effective date where the source states one, whether the state amends the model code and in which document, how far the state code reaches, and the changes under way. Every row that shows a value was read from an official state source, named and linked under the row, and checked on October 4, 2026.

Summary

Counts over all 51 jurisdictions, computed from the table below when the page is built. A row counts as not confirmed where the research could not confirm the basis cell against an official source, and as no data where no official page could be loaded at all (IL, NE, NV).

Plumbing code basis
Basis	Count	Jurisdictions
International Plumbing Code (IPC)	25	AL AR CO CT DE DC FL GA IN LA MD MI NH NY NC OH OK PA RI SC TN UT VT VA WV
Uniform Plumbing Code (UPC)	13	AK CA HI ID IA ME MN MT NM ND OR SD WA
National Standard Plumbing Code (NSPC)	1	NJ
Code written by the state	3	KY MA WI
No statewide code; cities and counties adopt their own	5	AZ KS MS MO WY
Other arrangement	1	TX
No data: the official page could not be loaded	3	IL NE NV

Fuel gas code basis
Basis	Count	Jurisdictions
International Fuel Gas Code (IFGC)	29	AL AR CO DC FL GA ID IN LA MD MN MT NJ NY NC ND OH OK OR PA RI SC TN TX UT VA WA WV WY
Uniform Plumbing Code, Chapter 12 (fuel gas piping)	5	AK CA HI IA NM
NFPA 54, National Fuel Gas Code	6	CT DE ME MA NH VT
No statewide code; cities and counties adopt their own	3	AZ MS MO
Other arrangement	2	KS MI
Not confirmed	3	KY SD WI
No data: the official page could not be loaded	3	IL NE NV

How to read a row

Basis names the model code: the International Plumbing Code (IPC) or the Uniform Plumbing Code (UPC) for plumbing; the International Fuel Gas Code (IFGC), Chapter 12 of the UPC or NFPA 54 for fuel gas. Three states write their own plumbing code and one adopts the National Standard Plumbing Code. Where a state adopts no code of its own, the row says so and the city or county code is the only code.
Edition is the model code year. Where the state publishes its own edition name, the row prints that name with the model year beside it, as the source does.
Effective is the date the current edition took effect, where the source states one. Several states run a transition window in which the previous edition may still be used; see the pending changes line.
State amendments says whether the state changes the model code and names the document that holds the changes. Local amendments are not listed.
Scope says how far the state plumbing code reaches: statewide and uniform, a statewide minimum that local governments may make stricter, no statewide code, or a mixed arrangement explained in its note. Where part of a state is carved out, the note under the label names it. Where the fuel gas code reaches differently, its Basis row says so.
not confirmed marks a cell the research could not trace to an official source on the date shown. The reason is listed under the row. Nothing on this page was filled in from memory.
not stated in the source opened marks a cell the official source does not fill. For pending changes it means that none was recorded, not that none exists.

Jurisdictions

Alabama AL

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition (2021 IPC for commercial plumbing; 2021 IRC for residential plumbing)  Effective October 15, 2022  State amendments No. No state amendment package. Rule 720-X-1-.02 adopts the model codes as minimum standards; for the IRC it states that the administrative sections in Chapter 1 shall not be applicable.   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2021 edition (2021 IFGC for commercial gas; 2021 IRC for residential gas)  Effective October 15, 2022  State amendments No. None at state level; 2021 IFGC adopted as a minimum standard by Rule 720-X-1-.02 without amendments.   

Scope: Mixed arrangement for the plumbing code, see the note. State board minimum standard for licensed contractors that applies in the absence of locally adopted codes; cities and counties adopt their own technical codes. For residential work the rule adds that where there is a conflict between the 2021 IRC and a locally adopted code, the IRC governs.
Adopting agency: Alabama Plumbers and Gas Fitters Examining Board
Legal cite: Ala. Admin. Code r. 720-X-1-.02; Code of Ala. 1975, Section 34-37-2(a)
Pending changes: none stated in the sources opened on October 4, 2026

Not confirmed on October 4, 2026:

Division of Construction Management State Building Code: plumbing and fuel gas editions for state buildings and schools could not be confirmed (dcm.alabama.gov and bc.alabama.gov refused connections today).
Which cities use codes other than the IPC: no official statewide list was opened today.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The board rule is a floor for licensed contractors, not a conventional statewide building code: municipalities and counties adopt and enforce their own plumbing and gas codes, so a plumber must check the local jurisdiction first. Medical gas: 2021 IPC for nonflammable medical gases and NFPA 99 for flammable medical gases, with NITC or other board approved certification. State-owned buildings, K-12 and public postsecondary schools, hotels and motels and movie theaters are regulated by the State Building Code of the Alabama Department of Finance Division of Construction Management, whose website could not be reached today.

Checked against the official source, October 2026: admincode.legislature.state.al.us. Alabama Plumbers and Gas Fitters Examining Board Administrative Code, Chapter 720-X-1 Description of the Board, Rule 720-X-1-.02 Minimum Standards For Installation, Service, And Repair (Revised 10/15/22)

Alaska AK

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition 2018 edition  Effective April 24, 2020  State amendments Yes. 8 AAC 63.010(a)(1)(A) to (D) revisions to the 2018 UPC (for example added Section 1210.2.3.1 prohibiting LP gas piping to appliances in pits or basements, and a rewritten Section 612.2 on multipurpose sprinkler systems); UPC Section 1101.5 excluded.   

 Fuel gas code   Basis Uniform Plumbing Code, Chapter 12 (fuel gas piping). UPC chapter 12 gas piping under 8 AAC 63.010 (am 4/24/2020); IFGC 2021 Chapter 3 Section 304 and Chapters 6 and 7 (fuel gas utilization equipment) under 13 AAC 50.024, am 10/28/2022. fuel gas effective date shows the 8 AAC 63.010 date.  Edition 2018 UPC chapters 12 to 17 (gas piping) under 8 AAC 63.010; plus 2021 IFGC Chapter 3 Section 304 and Chapters 6 and 7 (fuel gas utilization equipment) under 13 AAC 50.024, effective October 28, 2022  Effective April 24, 2020  State amendments Yes. 8 AAC 63.010(a)(1)(A) revisions to UPC chapter 12 (new Section 1210.2.3.1 on LP gas piping); 13 AAC 50.024 changes IFGC electrical code references to the Alaska electrical code (8 AAC 70.025).   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code. Minimum plumbing standards to be followed throughout the state. Municipalities may prescribe standards no less stringent than the state code; organized municipalities or unorganized villages with fewer than 2,500 people are exempt from AS 18.60.705 to 18.60.740.
Adopting agency: Alaska Department of Labor and Workforce Development, Division of Labor Standards and Safety, Mechanical Inspection
Legal cite: 8 AAC 63.010; AS 18.60.705; AS 18.60.735
Pending changes: none stated. A 2025 proposed amendment to 8 AAC 63.010(a) changes only the introductory sentence (adds: except as provided under AS 18.60.710 or 18.60.735) and keeps the 2018 UPC.

Not confirmed on October 4, 2026:

Local amendments adopted by Anchorage, Fairbanks, Juneau and other deferred jurisdictions were not opened today.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Dash characters in quoted section ranges were normalized to hyphens. The statute AS 18.60.705 still prints the 1997 UPC but allows the department to adopt a later edition by regulation, which 8 AAC 63.010 does. Also adopted in 8 AAC 63.010: 2018 Uniform Swimming Pool, Spa and Hot Tub Code and 2018 Uniform Solar Energy and Hydronics and Geothermal Code. State fire marshal plan review is deferred to local authorities in Anchorage, Palmer, Juneau, Fairbanks, Kenai, Ketchikan, Seward, Kodiak, Sitka, Soldotna, University of Alaska Fairbanks and Central Mat-Su FSA (dps.alaska.gov/fire/prb/home); those jurisdictions may have their own plumbing code amendments, not checked today.

Checked against the official source, October 2026: labor.alaska.gov. Plumbing Code Statutes and Regulations, April 2020, Labor Standards and Safety Division, Mechanical Inspection (Alaska Department of Labor and Workforce Development), 8 AAC 63.010 Minimum plumbing standards

Arizona AZ

 Plumbing code   Basis No statewide code; cities and counties adopt their own   

 Fuel gas code   Basis No statewide code; cities and counties adopt their own   

Scope: No statewide plumbing code. Each city or county adopts its own. Arizona statutes assign adoption of building, plumbing, electrical, fire and mechanical codes to cities, towns, counties and fire districts. Where no local code has been adopted, public buildings follow the state fire code and the codes of the largest city in the county.
Adopting agency: None statewide. Cities and towns adopt their own codes; county boards of supervisors may adopt codes for zoned unincorporated areas under A.R.S. 11-861.
Legal cite: A.R.S. 34-461(A) and (B); A.R.S. 11-861(A) and (C)(1)
Pending changes: none stated in the sources opened on October 4, 2026

Not confirmed on October 4, 2026:

Codes adopted by individual Arizona cities and counties were not opened today, so no city list is given.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

No Arizona state agency adopts a plumbing or fuel gas code for general construction. The conclusion rests on the quoted statutes, which place code adoption with local governments; no single official page saying 'Arizona has no statewide plumbing code' was found. A plumber must check the city, town or county where the job is located (Phoenix, Tucson, Mesa, Maricopa County and Pima County each publish their own adopted codes). Local codes may be either IPC or UPC based; the local adoptions were not opened today.

Checked against the official source, October 2026: www.azleg.gov. Arizona Revised Statutes 34-461. Applicability of local codes; exceptions; definition (Arizona State Legislature)

Arkansas AR

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2018 edition (2018 Arkansas Plumbing Code, based on the 2018 International Plumbing Code)  Effective August 12, 2021  State amendments Yes. 2018 Arkansas Plumbing Code (state edition published by ICC with Arkansas amendments integrated; codified as 17 CAR pt. 65)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2018 edition (2018 Arkansas Fuel Gas Code, based on the 2018 International Fuel Gas Code)  Effective August 12, 2021  State amendments Yes. 2018 Arkansas Fuel Gas Code (state edition published by ICC with Arkansas amendments integrated; 17 CAR pt. 67).   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions. State plumbing code provisions have the force of law as minimum standards statewide in application and apply to all buildings, public or private, rural or urban. Cities and counties run their own inspection programs after adopting the State Plumbing Code by rule or ordinance.
Adopting agency: Arkansas Department of Health (State Board of Health), Plumbing and Natural Gas Section, Division of Protective Health Codes
Legal cite: Ark. Code Ann. 17-38-103; Ark. Code Ann. 17-38-201; 17 CAR 66-109; 17 CAR pt. 65 (Arkansas Plumbing Code); 17 CAR pt. 67 (Arkansas Fuel Gas Code)
Pending changes: none stated in the sources opened on October 4, 2026

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The Arkansas Department of Health hosts only the cover pages of the state codes; the full text is sold by ICC. The Arkansas Fuel Gas Code is defined in 17 CAR 66-502 as 17 CAR pt. 67. Gas transmission and distribution piping up to the meter falls under the Arkansas Gas Pipeline Code (23 CAR pt. 451, Arkansas Public Service Commission). LP gas is regulated separately by the Arkansas Liquefied Petroleum Gas Board. The healthy.arkansas.gov program page itself (Cloudflare protected) gives no edition information.

Checked against the official source, October 2026: www.sos.arkansas.gov. Arkansas Register, Volume MMXXI Number 8, August 2021, Adopted Rules and Regulations (Arkansas Secretary of State)

California CA

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition 2025 California Plumbing Code (Title 24, Part 5), based on the 2024 Uniform Plumbing Code  Effective January 1, 2026  State amendments Yes. 2025 California Plumbing Code, California Code of Regulations Title 24, Part 5 (2024 UPC with California amendments adopted by HCD, OSHPD, DSA, SFM, DWR and other state agencies)   

 Fuel gas code   Basis Uniform Plumbing Code, Chapter 12 (fuel gas piping)  Edition 2025 California Plumbing Code (based on the 2024 UPC) for gas piping, together with the 2025 California Mechanical Code (Title 24, Part 4, based on the 2024 Uniform Mechanical Code) for gas appliances; the IFGC is not adopted in California  Effective January 1, 2026  State amendments Yes. 2025 California Plumbing Code (Title 24, Part 5) and 2025 California Mechanical Code (Title 24, Part 4), 2024 UPC and UMC with California amendments.   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code. Title 24 applies throughout the state whether or not the local government adopts it by ordinance. Cities and counties may adopt more restrictive amendments only with findings that they are reasonably necessary because of local climatic, geological or topographical conditions, filed with the state (HSC 17958.5, 17958.7, 18941.5).
Adopting agency: California Building Standards Commission (Department of General Services), with proposing state agencies including the Department of Housing and Community Development
Legal cite: California Code of Regulations, Title 24, Part 5; Health and Safety Code Sections 18901 et seq. (California Building Standards Law), 18938, 17958.5, 17958.7, 18941.5
Pending changes: none stated. Intervening code cycle supplements are published midway through each triennial edition; the CBSC page lists the 2022 Part 5 Supplement effective July 1, 2024, and the 2025 edition errata effective January 1, 2026.

Not confirmed on October 4, 2026:

California Plumbing Code Chapter 12 (Fuel Gas Piping) scope text was not opened today; fuel gas basis rests on the CBSC Guide statement that fuel gas provisions are in the California Plumbing Code and California Mechanical Code.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The official code text is published for the state by IAPMO (epubs.iapmo.org/2025/CPC/), linked from the CBSC Codes page; the viewer shell exposes no text to a fetch, so the Chapter 12 Fuel Gas Piping scope sentence of the CPC itself was not read today. Local amendments are common (for example Los Angeles, San Francisco and other cities file ordinances with CBSC); check the CBSC Local Amendments to Building Standards page for the jurisdiction. State agencies (OSHPD for hospitals, DSA for public schools) enforce Title 24 directly for their building types.

Checked against the official source, October 2026: www.dgs.ca.gov. Codes, California Building Standards Commission, Department of General Services

Colorado CO

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2024 edition (Colorado Plumbing Code: 2024 IPC Chapter 1 selected sections, Chapters 2 to 13 and 15, Appendices B, C, D and E; plus 2024 IRC Chapters 25 to 32 and selected sections)  Effective August 14, 2026  State amendments Yes. 3 CCR 720-1 Rule 1.2 E, Revisions and Exceptions to the Incorporated Codes (Colorado Plumbing Code and Colorado Fuel Gas Code amendments to the IPC, IFGC and IRC)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2024 edition (Colorado Fuel Gas Code: 2024 IFGC Chapter 1 selected sections, Chapters 2 to 8 except Sections 412 and 413, Appendices A to C; plus 2024 IRC Chapter 24 selected sections)  Effective August 14, 2026  State amendments Yes. 3 CCR 720-1 Rule 1.2 E, Revisions and Exceptions to the Incorporated Codes (Colorado Fuel Gas Code amendments to the IFGC and IRC Chapter 24).   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code. The Colorado Plumbing Code sets minimum standards throughout Colorado and binds licensees and the local jurisdictions that perform permitting and inspections. A city, town, county or city and county that adopts more stringent standards than the Colorado Codes must furnish a copy to the Board.
Adopting agency: Colorado State Plumbing Board, Department of Regulatory Agencies, Division of Professions and Occupations
Legal cite: 3 CCR 720-1, Rule 1.2 A (Colorado Plumbing Code) and Rule 1.2 B (Colorado Fuel Gas Code); C.R.S. 12-155-105(1)(e) and 12-155-106(1) and (5)
Pending changes: none stated; the 2024 editions themselves became effective August 14, 2026, replacing the 2021 IPC and 2021 IFGC that were in force in the version effective February 14, 2026

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Colorado has no statewide building code; counties and municipalities adopt building codes locally, but the plumbing and fuel gas codes are set statewide by the State Plumbing Board and apply everywhere, with local jurisdictions allowed to be more stringent. Denver and other home-rule cities publish their own amendments. The Board rules explicitly exclude later editions or amendments of the IPC, IFGC and IRC unless adopted by rule. In quotes, the character | separates non-adjacent fragments of the same source document.

Checked against the official source, October 2026: www.sos.state.co.us. Code of Colorado Regulations, 3 CCR 720-1, Department of Regulatory Agencies, State Plumbing Board, Plumbing Rules and Regulations (current version, effective 08/14/2026; Colorado Secretary of State)

Connecticut CT

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition (2021 International Plumbing Code portion of the 2022 Connecticut State Building Code)  Effective October 1, 2022  State amendments Yes. 2022 Connecticut State Building Code (with Errata #1), Amendments to the 2021 International Plumbing Code (pages 81 to 88)   

 Fuel gas code   Basis NFPA 54, National Fuel Gas Code  Edition NFPA 54 2021 edition (National Fuel Gas Code), adopted in the 2022 Connecticut State Fire Prevention Code (Section 2.2 NFPA Publications) and the 2022 Connecticut State Fire Safety Code; the International Fuel Gas Code is not adopted by Connecticut  Effective October 1, 2022  State amendments not stated in the source opened   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions. The State Building Code is the building code for all towns, cities and boroughs and all state agencies (CGS 29-252a and 29-253); municipalities do not adopt their own amendments.
Adopting agency: Office of the State Building Inspector and the Codes and Standards Committee, with approval of the Commissioner of Administrative Services (Connecticut Department of Administrative Services)
Legal cite: Connecticut General Statutes Sections 29-252, 29-252a, 29-253; 2022 Connecticut State Building Code (Regs. Conn. State Agencies 29-252-1d)
Pending changes: 2026 Connecticut State Building Code, Fire Safety Code and Fire Prevention Code are in adoption and will replace the 2022 codes. The 2026 CSBC is anticipated to adopt the 2024 International Plumbing Code (2024 IPC) and 2024 IMC, IBC, IRC and IECC. The codes were expected to take effect July 1, 2026, but as of October 4, 2026 DAS states the effective date has been delayed pending approval by the Legislative Regulation Review Committee of the Connecticut General Assembly. The 2022 CSBC (2021 IPC) remains in force; new codes will apply to permits applied for after the eventual effective date.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Connecticut is a uniform-code state: no municipal amendments. Gas piping and gas equipment are enforced under the fire codes (Connecticut State Fire Prevention Code and Fire Safety Code) rather than a fuel gas code; CGS 29-291a as amended by Public Act 21-165 makes the Fire Prevention Code applicable to gas equipment and piping. The Fire Safety Code document opened today is the legislative review draft dated April 20, 2022, which lists NFPA 54 2021; the final published edition carries the same effective date of October 1, 2022. In quotes, the character | separates non-adjacent fragments of the same source document.

Checked against the official source, October 2026: portal.ct.gov. 2022 Connecticut State Building Code (w/ Errata #1), ED: October 1, 2022, Connecticut Department of Administrative Services, Office of the State Building Inspector

Verification on October 4, 2026 corrected or newly sourced: pending change from portal.ct.gov; fuel gas edition from portal.ct.gov; additional sources from portal.ct.gov.

Delaware DE

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition (2021 State of Delaware Plumbing Code, based on the 2021 International Plumbing Code)  Effective August 11, 2022  State amendments Yes. 16 DE Admin. Code 4455, Delaware Regulations Governing a Detailed Plumbing Code, Section 2.0 Adoption of International Plumbing Code (Delaware amendments 2.1 to 2.x)   

 Fuel gas code   Basis NFPA 54, National Fuel Gas Code  Edition NFPA 54 2024 edition, adopted by the Delaware State Fire Prevention Commission in 1 DE Admin. Code 701 (Delaware State Fire Prevention Regulations, Regulation 701 Administration and Enforcement), Section 3.1.34, effective January 1, 2026 (29 DE Reg. 509, 12/01/25); applies to projects submitted on or after December 31, 2025  Effective January 1, 2026  State amendments not stated in the source opened   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions. Every political subdivision (county, city or municipal government) must enforce the IPC as adopted or modified by the Division of Public Health. Local jurisdictions may add water, wastewater and administrative requirements and set their own permit fees; proposed local modifications are submitted to the Division of Public Health for review.
Adopting agency: Delaware Department of Health and Social Services, Division of Public Health, Health Systems Protection (Plumbing Program)
Legal cite: 16 Del. Admin. Code 4455; 16 Del. C. Sections 122(3)e and 7903 (plumbing); 1 DE Admin. Code 701 Section 3.1.34; 16 Del. C. 6604(1) (fuel gas)
Pending changes: none stated for plumbing. For fuel gas, the 2026 edition of the Delaware State Fire Prevention Regulations (NFPA 54 2024) took effect January 1, 2026 and applies to projects submitted on or after December 31, 2025.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Delaware has no statewide building code (New Castle, Kent and Sussex counties and the municipalities adopt building codes), but plumbing is statewide through the Division of Public Health regulation, and fuel gas is statewide through the State Fire Prevention Regulations (State Fire Prevention Commission, enforced by the Office of the State Fire Marshal). The regulation's amendment 2.1 still inserts the words The 2018 Delaware Plumbing Code into IPC Section 101.1, an apparent leftover from the prior edition. Plumbing permits are issued by the Division of Public Health or by the local jurisdiction; local jurisdictions set their own fee schedules. In quotes, the character | separates non-adjacent fragments of the same source document.

Checked against the official source, October 2026: regulations.delaware.gov. 16 Del. Admin. Code 4455 Delaware Regulations Governing a Detailed Plumbing Code, Department of Health and Social Services, Division of Public Health (Office of the Registrar of Regulations, Legislative Council)

Verification on October 4, 2026 corrected or newly sourced: fuel gas edition, legal cite from regulations.delaware.gov.

District of Columbia DC

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2015 edition (District of Columbia Plumbing Code (2017): 2015 International Plumbing Code as amended by the Plumbing Code Supplement of 2017, 12-F DCMR)  Effective May 29, 2020  State amendments Yes. Plumbing Code Supplement of 2017, Title 12-F DCMR (part of the District of Columbia Construction Codes Supplement of 2017)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2015 edition (District of Columbia Fuel Gas Code (2017): 2015 International Fuel Gas Code as amended by the Fuel Gas Code Supplement of 2017, 12-D DCMR)  Effective May 29, 2020  State amendments Yes. Fuel Gas Code Supplement of 2017, Title 12-D DCMR.   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions. Single jurisdiction; the DC Construction Codes apply District-wide and are enforced by the Department of Buildings.
Adopting agency: District of Columbia Department of Buildings (formerly Department of Consumer and Regulatory Affairs), with the Construction Codes Coordinating Board; rules codified in Title 12 DCMR
Legal cite: 12-F DCMR (Plumbing Code Supplement of 2017); 12-D DCMR (Fuel Gas Code Supplement of 2017); Final Rulemaking published at 67 DCR 6148 and 67 DCR 6072 (May 29, 2020, Part 2)
Pending changes: A comprehensive update is in progress but not adopted: DOB announced on June 8, 2026 that it plans to publish the first set of proposed regulations in mid-to-late fall 2026 with a 45-day comment period, a second set in summer 2027, and final rules in winter 2027. The release does not state which ICC edition (2021 or 2024) the new codes will use.

Not confirmed on October 4, 2026:

Model code edition (2021 or 2024 ICC) for the forthcoming DC Construction Codes: not stated in the DOB release opened today.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

DC still enforces 2015-based codes as of today. The dcregs.dc.gov section pages carry the official text; the DOB page warns that the integrated code books on the ICC site do not show amendments adopted after May 29, 2020, so Title 12 DCMR is the authority. Permit applications filed before May 29, 2020 could use the 2013 Codes (2012 ICC) under transition rules in 12-A DCMR Section 123. In quotes, the character | separates non-adjacent fragments of the same source document.

Checked against the official source, October 2026: dcregs.dc.gov. D.C. Municipal Regulations, Title 12 Construction Codes Supplement of 2017, Subtitle 12-F Plumbing Code Supplement of 2017, Section 12-F403 Minimum Plumbing Facilities (DC Office of Documents and Administrative Issuances, dcregs.dc.gov)

Florida FL

 Plumbing code   Basis International Plumbing Code (IPC)  Edition Florida Building Code, Plumbing, 8th Edition (2023), based on the 2021 International Plumbing Code  Effective December 31, 2023  State amendments Yes. Florida Building Code, Plumbing, 8th Edition (2023) (Florida-specific amendments integrated into the FBC volume)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition Florida Building Code, Fuel Gas, 8th Edition (2023), based on the 2021 International Fuel Gas Code  Effective December 31, 2023  State amendments Yes. Florida Building Code, Fuel Gas, 8th Edition (2023) (Florida-specific amendments integrated; not all 2021 IFGC changes included).   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code.
Adopting agency: Florida Building Commission (Department of Business and Professional Regulation)
Legal cite: Section 553.73, Florida Statutes; Rule 61G20-1.001, Florida Administrative Code (rule text as amended 3-18-2026 adopts the Florida Building Code, 8th Edition (2023), as updated by the Commission through December 9, 2025)
Pending changes: 9th Edition (2026) Florida Building Code, developed from the 2024 I-Codes (IPC, IFGC and others). A Notice of Proposed Rule for Rule 61G20-1.001 (notice 31378159, published 9/23/2026, Vol. 52/185, comment period 9/23/2026 to 10/14/2026) proposes to incorporate the Florida Building Code, 9th Edition (2026) by reference; the Commission workplan (August 2026) lists the effective date as 12/31/2026. Not yet in effect.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The FBC Plumbing and FBC Fuel Gas volumes are the statewide codes; cities and counties may adopt more stringent local technical amendments under s. 553.73(4), F.S. (Broward County, for example, files local amendments to the FBC Plumbing). The 9th Edition (2026) is based on the 2024 IPC and 2024 IFGC and is scheduled to take effect December 31, 2026; the Commission workplan quote above uses a hyphen where the source prints a dash.

Checked against the official source, October 2026: www.floridabuilding.org, the Florida Building Commission site. Florida Building Commission home page (floridabuilding.org)

Verification on October 4, 2026 corrected or newly sourced: legal cite from www.flrules.org; pending change from www.flrules.org.

Georgia GA

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2024 International Plumbing Code with Georgia Amendments (Georgia State Minimum Standard Plumbing Code)  Effective January 1, 2026  State amendments Yes. Georgia State Amendments to the International Plumbing Code (2024 Edition), Revised January 1, 2026   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2024 International Fuel Gas Code with Georgia Amendments (Georgia State Minimum Standard Gas Code), effective January 1, 2026; amendment packet Revised January 1, 2026  Effective January 1, 2026  State amendments Yes. Georgia State Amendments to the International Fuel Gas Code (2024 Edition), Revised January 1, 2026.   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code.
Adopting agency: Georgia Department of Community Affairs (Board of Community Affairs, on recommendation of the State Codes Advisory Committee)
Legal cite: O.C.G.A. 8-2-20 through 8-2-26 (Uniform Codes Act); adoption under O.C.G.A. 8-2-23; local amendments under O.C.G.A. 8-2-25
Pending changes: None for plumbing or fuel gas. The next cycle (Notice of Intent dated August 20, 2026, effective January 1, 2027 if adopted) covers the 2024 IBC amendments, 2024 IEBC and 2024 IPMC only.

Not confirmed on October 4, 2026:

O.C.G.A. text itself was not opened (official Georgia Code is hosted by LexisNexis); statutory cites are taken from the DCA pages and memo.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Mandatory state minimum codes apply to all construction whether or not the local government enforces them; local governments may adopt stricter local amendments after DCA review under O.C.G.A. 8-2-25(c). The DCA announcement web page at https://dca.georgia.gov/announcement/2025-12-09/new-codes-jan-2026 currently carries the headline 'Effective January 1, 2027' for the same list of codes, which conflicts with the December 1, 2025 memo PDF and with the amendment packets marked 'Revised January 1, 2026'; the PDFs are treated as controlling here. For one- and two-family dwellings the DCA Board omitted the plumbing chapters of the IRC, so the IPC with Georgia amendments governs dwelling plumbing too (DCA codes info sheet).

Checked against the official source, October 2026: dca.georgia.gov. DCA Memorandum, December 1, 2025: Notice of the adoption of the 2024 ICC Code Editions and the 2026 Georgia Amendments to the 2023 National Electrical Code with an effective date of January 1, 2026

Hawaii HI

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition Hawaii State Plumbing Code: 2018 Uniform Plumbing Code with State amendments (HAR Chapter 3-183)  Effective May 19, 2020  State amendments Yes. State Building Code Council, Hawaii State Plumbing Code: Proposed Amendments to the 2018 Uniform Plumbing Code, V 1.6 (as of 4/21/2020 SBCC), effective May 19, 2020   

 Fuel gas code   Basis Uniform Plumbing Code, Chapter 12 (fuel gas piping)  Edition 2018 UPC (fuel gas piping chapter) through the State Plumbing Code; the State Building Code (2018 IBC amendments, effective April 20, 2021) and State Residential Code (2018 IRC amendments, effective November 17, 2020) both redirect every International Fuel Gas Code reference to the adopted State Plumbing Code  Effective May 19, 2020  State amendments Yes. Hawaii State Plumbing Code amendments to the 2018 UPC (chapter 12 included), V 1.6, effective May 19, 2020.   

Scope: Mixed arrangement for the plumbing code, see the note. State code adopted by the State Building Code Council; enforced when adopted by each county (with county amendments), or as an interim code if a county fails to adopt within the statutory period (HRS 107-28); the two-year county adoption deadline is currently suspended by emergency proclamation
Adopting agency: Hawaii State Building Code Council (Department of Accounting and General Services)
Legal cite: HRS 107-25 and 107-28; HAR Title 3, Chapter 183 (State Plumbing Code)
Pending changes: None listed on the Building Code Rules page as of October 4, 2026 (2018 UPC remains the listed State Plumbing Code). In addition, the Governor's 15th Emergency Proclamation Relating to Affordable Housing (signed September 23, 2025) suspends HRS 107-24(c) to the extent necessary to suspend the State Building Code Council's ability to amend or update the state building codes, so no new state code edition can be adopted by the SBCC while the proclamation is in effect; counties may still update county codes.

Not confirmed on October 4, 2026:

HRS 107-25 and 107-28 statute text (capitol.hawaii.gov blocks automated access); cites are taken from the SBCC documents that reference them.
Current county adoption status of the 2018 UPC in each county (not checked today).

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The state code is a model for the four counties (Honolulu, Maui, Hawaii, Kauai); each county adopts the state code by ordinance and may amend it, so check the county code before relying on the state text. The Hawaii State Plumbing Code is scanned (image-only); quotes above were read from the page images. The Building Code Rules page cites the Governor's 15th Emergency Proclamation Relating to Affordable Housing (signed September 23, 2025) for the suspension of the HRS 107-28 two-year county deadline. Hawaii has no separate statewide fuel gas code; gas piping falls under UPC Chapter 12 via the State Plumbing Code, and LP gas under the State Fire Code (2024 NFPA 1).

Checked against the official source, October 2026: ags.hawaii.gov. State Building Code Council, Hawaii State Plumbing Code, Proposed Amendments to the 2018 Uniform Plumbing Code (V 1.6 as of 4/21/2020 SBCC)

Verification on October 4, 2026 corrected or newly sourced: pending change from ags.hawaii.gov.

Idaho ID

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition Idaho State Plumbing Code (ISPC): 2015 Uniform Plumbing Code with Idaho amendments (IDAPA 24.39.20.600)  Effective not confirmed  State amendments Yes. IDAPA 24.39.20, Rules Governing Plumbing, Section 600 Idaho State Plumbing Code (amendments listed in 600.01 and following)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2018 International Fuel Gas Code with Idaho amendments (IDAPA 24.39.70, Rules Governing Heating, Ventilation, and Air Conditioning Systems, adopted by the Idaho HVAC Board); rule paragraph dated 3-28-23  Effective not confirmed  State amendments Yes. IDAPA 24.39.70, Rules Governing Heating, Ventilation, and Air Conditioning Systems, Section on the 2018 IFGC with the following amendments (3-28-23).   

Scope: not confirmed
Adopting agency: Idaho Plumbing Board, Division of Occupational and Professional Licenses (DOPL)
Legal cite: Idaho Code 54-2601; IDAPA 24.39.20.600
Pending changes: No active rulemaking on IDAPA 24.39.20 (plumbing) or IDAPA 24.39.70 (HVAC and fuel gas) as of the September 2, 2026 Idaho Administrative Bulletin: the Abridged Rulemaking Index of active rulemakings (April 2, 2026 to September 2, 2026) lists, for the Division of Building Safety, only docket 24-3910-2601 (Rules of the Idaho Electrical Board). Bulletins Vol. 25-6 (June 2025) through Vol. 26-9 (September 2026) contain no notice for 24.39.20 or 24.39.70. The 2015 UPC therefore remains the Idaho State Plumbing Code with no newer edition adopted or proposed in the Bulletin.

Not confirmed on October 4, 2026:

scope: Idaho Code 54-2601 (statewide application of the ISPC and whether cities or counties may amend it) could not be opened today (legislature.idaho.gov blocked); left empty.
plumbing effective date and fuel gas effective date: dates shown are the rule paragraph dates (3-28-23) from the official rule text; the original effective date of the 2015 UPC adoption was not confirmed.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The (3-28-23) tag is the effective date printed on the current rule paragraph, not necessarily the date the 2015 UPC was first adopted. The DOPL website (dopl.idaho.gov), adminrules.idaho.gov and legislature.idaho.gov refused connections from this location today; the rules were read from the Office of Administrative Rules file server (files.dfm.idaho.gov), which is the official publication channel for the Idaho Administrative Code. The HVAC rules (24.39.70) also adopt the 2018 IRC Part VI (Fuel Gas) for dwellings.

Checked against the official source, October 2026: files.dfm.idaho.gov. IDAPA 24.39.20 Rules Governing Plumbing (Idaho Administrative Code, current rules file published by the Division of Financial Management, Office of Administrative Rules; file dated June 2026)

Verification on October 4, 2026 corrected or newly sourced: pending change from files.dfm.idaho.gov.

Illinois IL

The official page could not be loaded from the research network on October 4, 2026, so no value is shown for Illinois. The research expected the source to be the Illinois Plumbing Code, 77 Ill. Adm. Code 890, on ilga.gov, and the plumbing program of the Illinois Department of Public Health (dph.illinois.gov). Ask that department or the code official where the work is done.

Indiana IN

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2012 Indiana Plumbing Code, based on the International Plumbing Code, 2006 Edition, Second Printing  Effective December 24, 2012  State amendments Yes. 675 IAC 16-1.4 (2012 Indiana Plumbing Code: Indiana amendments to the 2006 IPC)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2014 Indiana Fuel Gas Code, 675 IAC 25-3, based on the International Fuel Gas Code, 2012 Edition, Second Printing  Effective December 1, 2014  State amendments Yes. 675 IAC 25-3 (2014 Indiana Fuel Gas Code: Indiana amendments to the 2012 IFGC).   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: Indiana Fire Prevention and Building Safety Commission (Indiana Department of Homeland Security)
Legal cite: 675 IAC 16-1.4; IC 22-13-2-2 and IC 22-13-2-3
Pending changes: No new edition adopted. LSA Document #26-128 (Fire Prevention and Building Safety Commission Rulemaking Docket, Plumbing Code Update 2026) proposes amendments to the existing 2012 Indiana Plumbing Code to remain in compliance with the Safe Drinking Water Act lead-free provisions: proposed rule and notice of public hearing published May 20, 2026, public hearing June 25, 2026, final rule, approvals and effective date all TBD as of the docket update of August 17, 2026. The Commission's other listed rulemaking dockets are Rule Readoptions (2025, LSA #24-566) and Electrical Code Update (2026); the Building Code Update Committee is reviewing the 2024 International Building Code but no building or fire code rulemaking docket was found on the DHS site. No fuel gas code rulemaking listed.

Not confirmed on October 4, 2026:

Rule text of 675 IAC 16-1.4-1 and 675 IAC 25-3-1 (adoption-by-reference sections) was not opened; edition, printing and effective dates come from the official DHS Commission rules table.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Indiana's rules take precedence over local ordinances and, since the 2023 amendment of IC 22-13-2-3, cities, towns and counties may not adopt more stringent or more detailed requirements. The Indiana Register site (iar.iga.in.gov) that hosts the 675 IAC text did not render from this location (its scripts returned 403), so the rule rows were taken from the DHS Commission rules page and the statute from iga.in.gov.

Checked against the official source, October 2026: www.in.gov. DHS: Rules of the Indiana Fire Prevention and Building Safety Commission

Verification on October 4, 2026 corrected or newly sourced: pending change from www.in.gov.

Iowa IA

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition Iowa State Plumbing Code: 2024 Uniform Plumbing Code (Sections 101 and 102, Chapters 2 to 17, Appendices A and M) with Iowa amendments  Effective March 26, 2025  State amendments Yes. 481 IAC Chapter 425 State Plumbing Code, rule 481-425.4(105) Amendments to Uniform Plumbing Code   

 Fuel gas code   Basis Uniform Plumbing Code, Chapter 12 (fuel gas piping)  Edition Chapter 12 of the 2024 UPC per 481-425.3(105), effective March 26, 2025, unless in conflict with the LP gas chapter (481-425.3 still cites 661-Chapter 226, which was transferred to 481-Chapter 286 by IAC Supplement 7/9/25); 481-286.1(101) adopts NFPA 54 (ANSI Z223.1-2024), 2024 edition, and NFPA 58, 2024 edition, with Iowa amendments for LP gas. The State Mechanical Code (481 IAC 426, 2024 IMC) replaces IFGC references with NFPA 54 current edition, NFPA 58 current edition, 661-Chapter 226 and the state plumbing code.  Effective March 26, 2025  State amendments not stated in the source opened   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code.
Adopting agency: Plumbing and Mechanical Systems Board, Iowa Department of Inspections, Appeals, and Licensing
Legal cite: Iowa Code section 105.4; 481 IAC Chapter 425 (formerly 641 IAC Chapter 25)
Pending changes: None stated in the chapter (chapter rescission review date 3/26/30).

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Permits and inspections are administered by local jurisdictions, not the board (Iowa amendment to UPC 101.2). Local jurisdictions may not adopt a different plumbing code but may adopt stricter amendments and must send copies to the board. The Iowa amendments replace the UPC fixture-count table with IPC Table 403.1 (reprinted as Table 422.1). Rule citations use a hyphen where the Iowa Administrative Code prints a dash (481-425.1 for 481 em dash 425.1).

Checked against the official source, October 2026: www.legis.iowa.gov. Iowa Administrative Code, Inspections, Appeals, and Licensing [481], Plumbing and Mechanical Systems Board, Chapter 425 State Plumbing Code (IAC 9/30/26)

Verification on October 4, 2026 corrected or newly sourced: fuel gas edition from www.legis.iowa.gov; legal cite from www.legis.iowa.gov.

Kansas KS

 Plumbing code   Basis No statewide code; cities and counties adopt their own   

 Fuel gas code   Basis Other arrangement. None-statewide for general gas piping; the State Fire Marshal adopts NFPA 54 (2006 edition) and NFPA 58 (2008 edition) by reference in its liquefied petroleum gas regulations (K.A.R. 22-8-13)  Edition NFPA 54, 2006 edition (K.A.R. 22-8-13, effective March 31, 2006, amended Feb. 4, 2011), applied through the LP gas article; the Fire Marshal code listing page shows NFPA 54 2002 edition, so the editions differ between the two official pages  Effective not stated in the source opened  State amendments not stated in the source opened   

Scope: No statewide plumbing code. Each city or county adopts its own.
Adopting agency: None statewide; cities adopt plumbing regulations by ordinance under K.S.A. 12-1505 (counties under home rule)
Legal cite: K.S.A. 12-1505 (cities may prescribe plumbing rules by ordinance); K.S.A. 76-7,130 (defines local building code to include any plumbing code or gas piping code)
Pending changes: not stated in the source opened

Not confirmed on October 4, 2026:

No single official page states in so many words that Kansas has no statewide plumbing code; the conclusion rests on K.S.A. 12-1505, K.S.A. 76-7,130, the KCC home-rule statement and the 2020 fiscal note quoting the State Fire Marshal.
Whether K.A.R. 22-8-13 has been amended after Feb. 4, 2011 (the Fire Marshal's PDF is undated); the Fire Marshal code listing shows a different NFPA 54 edition (2002).

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Kansas has no statewide plumbing code and no general statewide fuel gas code: cities adopt their own plumbing and gas piping codes by ordinance (commonly editions of the UPC or IPC and the IFGC), and many rural counties have none. The only statewide gas rule found is the State Fire Marshal's LP gas article (K.A.R. 22-8), which adopts NFPA 54 and NFPA 58 for LP gas systems under K.S.A. 55-1812. Always check the city or county code office. The 2016 Kansas Codes Collaborative survey (KCC) lists codes adopted by individual jurisdictions.

Checked against the official source, October 2026: www.kslegislature.gov. Kansas Division of the Budget, Fiscal Note for HB 2703 (February 19, 2020)

Kentucky KY

 Plumbing code   Basis Code written by the state  Edition Kentucky State Plumbing Code, 815 KAR Chapter 20 (state-written regulations; comprehensive revision effective June 2, 2020, with later amendments to individual regulations through December 5, 2023)  Effective June 2, 2020  State amendments No. Not applicable: the code is written by the state (815 KAR 20:010 through 20:195), not an amended model code   

 Fuel gas code   Basis not confirmed  Edition not confirmed   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: Kentucky Department of Housing, Buildings and Construction, Division of Plumbing (Public Protection Cabinet)
Legal cite: KRS 318.130 (code promulgation); KRS 318.015 (statewide application); KRS 318.140 (local enforcement); 815 KAR Chapter 20
Pending changes: None shown on the LRC regulation pages for 815 KAR Chapter 20 (all current regulations list no pending amendment).

Not confirmed on October 4, 2026:

fuel gas code basis and fuel gas edition: the Kentucky Building Code (2018 KBC, Fourth Edition, February 2024) and Kentucky Residential Code documents on dhbc.ky.gov could not be opened (connection timed out); which IFGC or NFPA 54 edition they reference and with what Kentucky amendments was not confirmed.
DHBC Division of Plumbing web page (dhbc.ky.gov) not opened; agency name taken from the regulations and statutes.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Kentucky does not adopt the IPC or UPC; 815 KAR Chapter 20 is its own code and applies in every county. Local governments may enact the state code by ordinance to run their own permit and inspection programs (KRS 318.140) but cannot substitute a different code. Latest amendment dates by regulation: 20:030 Plumbing licenses eff. 12-5-2023; 20:050 Installation permits and 20:195 Medical gas piping eff. 3-1-2022; 20:150 Inspections and tests eff. 6-15-2021; 20:191 Minimum fixture requirements eff. 7-28-2020; all other current regulations eff. 6-2-2020. Fuel gas: the water heater regulation points to the National Fuel Gas Code in Chapter 35 of the Kentucky Building Code (815 KAR 7:120 incorporates the 2015 IBC with the 2018 Kentucky Building Code amendments, Fourth Edition February 2024), but the KBC document itself is hosted on dhbc.ky.gov, which was unreachable today, so the fuel gas cells are left empty.

Checked against the official source, October 2026: apps.legislature.ky.gov. KRS 318.015 Application of chapter and of state plumbing code (Kentucky Legislative Research Commission)

Louisiana LA

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition  Effective January 1, 2023  State amendments Yes. Louisiana Administrative Code Title 17, Part I, Chapter 1, Section 111 (International Plumbing Code) with Louisiana amendments; consolidated in the LUCCC Laws, Rules and Regulations (blue book) dated 08/01/2026   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2021 edition  Effective January 1, 2023  State amendments Yes. LAC 17:I.113 (International Fuel Gas Code) amends IFGC Section 310.3 (arc-resistant CSST) and Section 404.14 (piping underground beneath buildings)   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: Louisiana Uniform Construction Code Commission (LUCCC; renamed from Louisiana State Uniform Construction Code Council effective August 1, 2026)
Legal cite: La. R.S. 37:3727 to 37:3750 (formerly R.S. 40:1730.21 et seq.); LAC 17:I.101, 17:I.111 (IPC), 17:I.113 (IFGC)
Pending changes: 2024 IPC and 2024 IFGC (with the other 2024 I-Codes and the 2023 NEC) approved by LUCCC on July 7, 2026, effective January 1, 2027 (LAC 17:I.101.A as approved: 'effective January 1, 2027'; LUCCC code information sheet: 'ICC code editions will become effective January 1, 2027')

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The Louisiana State Plumbing Code (Sanitary Code Part XIV) was replaced by the IPC statewide on January 1, 2016 (LUCCC history table). Louisiana amends IPC Section 101.2 so that fuel gas distribution piping, fuel-gas-fired water heaters and water heater venting are regulated by the IFGC. Local governments must enforce only the state Uniform Construction Code; more stringent local requirements require LUCCC approval. The adopting body was renamed LUCCC and its enabling statute moved to R.S. 37:3727 to 37:3750 on August 1, 2026 (Act 881 of 2026). The LUCCC says the 2024 editions take effect January 1, 2027; the rule has not yet been published in the Louisiana Register in final form as of the pages opened today (LR 52 citation left blank in the approved language).

Checked against the official source, October 2026: lsuccc.la, the Louisiana State Uniform Construction Code Council site. State of Louisiana Uniform Construction Code (LUCCC construction code information sheet, revised 08/06/2026)

Maine ME

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition 2021 edition  Effective January 1, 2022  State amendments Yes. 02-395 C.M.R. Chapter 4, Installation Standards (Plumbers' Examining Board), Section 1.C Exclusions and Amendments   

 Fuel gas code   Basis NFPA 54, National Fuel Gas Code  Edition 2021 edition  Effective September 16, 2023  State amendments Yes. 02-658 C.M.R. Chapter 6, Adoption of Standards (Maine Fuel Board), Section 6.2.3 exclusions and amendments to NFPA 54   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: Maine Plumbers' Examining Board (Office of Professional and Occupational Regulation, Department of Professional and Financial Regulation)
Legal cite: 32 M.R.S. sections 3403-A, 3403-B(1), 3302; 02-395 C.M.R. ch. 4
Pending changes: not stated in the source opened

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Plumbing is regulated separately from the Maine Uniform Building and Energy Code (MUBEC): the Plumbers' Examining Board rule applies to all plumbing installations in the state and is enforced by municipal Local Plumbing Inspectors (LPIs). The board does not adopt UPC Chapter 12 (fuel gas piping) or Chapter 13 (medical gas); fuel gas is regulated by the Maine Fuel Board, which adopts NFPA 54 (2021), NFPA 58 (2020) and related NFPA standards with Maine amendments (02-658 C.M.R. ch. 6). The board page gives January 1, 2022 as the effective date of the 2021 UPC adoption; the current consolidated chapter text shows a later re-filing effective March 6, 2024 (filing 2024-047). The Maine Fuel Board chapter was repealed and replaced effective September 16, 2023 and amended March 30, 2024; the current text lists the 2021 NFPA 54, and the date the 2021 edition first took effect was not stated separately on the pages opened.

Checked against the official source, October 2026: www.maine.gov. Plumbers' Examining Board | Office of Professional and Occupational Regulation (Maine.gov)

Verification on October 4, 2026 corrected or newly sourced: fuel gas effective date from www.maine.gov.

Maryland MD

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition  Effective May 29, 2023  State amendments Yes. COMAR 09.20.01 State Plumbing Code: the former IPC modifications in COMAR 09.20.01.02 were repealed effective November 24, 2025; COMAR 09.20.01.05 (Limit on Lead Content) remains; COMAR 09.12.50.02-1B(2) deletes IPC Section 404 for industrialized buildings   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2018 edition  Effective December 30, 2019  State amendments No. COMAR 09.20.01.04 (Modifications to the National Fuel Gas Code) repealed effective November 24, 2025   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code. The State Plumbing Code title does not apply to Baltimore County or to WSSC areas of Montgomery and Prince George's counties, which run their own plumbing and fuel gas codes; statute also refers to 'any applicable local plumbing code' (section 12-605). Local jurisdictions enforce the Maryland Building Performance Standards and may adopt local amendments (COMAR 09.12.51.01B(11), .04B(1)).
Adopting agency: Maryland State Board of Plumbing (Maryland Department of Labor), with the IPC edition set by the Department of Labor in COMAR 09.12.50 (Model Performance Code)
Legal cite: Md. Code Ann., Business Occupations and Professions sections 12-101(p), 12-205 and 12-207; COMAR 09.20.01.01; COMAR 09.12.50.02-1B(2)
Pending changes: No newer plumbing edition adopted on the pages opened. COMAR 09.12.50.02B refers to a future 'Department's adoption of the 2024 edition of the International Building Code' without a date.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Edition chain: COMAR 09.20.01.01B(1) adopts the IPC 'incorporated by reference in COMAR 09.12.50.02-1B(2)', and that regulation names the 2021 IPC (amended effective May 29, 2023). The plumbing effective date is the date the 2021 IPC entered COMAR 09.12.50; the Board of Plumbing regulation itself was last amended November 24, 2025, when the Maryland-specific IPC and NFPA 54 modification chapters were repealed. The State Plumbing Code title does not apply to Baltimore County or to WSSC areas of Montgomery and Prince George's counties, which run their own plumbing and fuel gas codes; statute also refers to 'any applicable local plumbing code' (section 12-605). Local jurisdictions enforce the Maryland Building Performance Standards and may adopt local amendments (COMAR 09.12.51.01B(11), .04B(1)). Fuel gas: COMAR adopts the IFGC, NFPA 54 and NFPA 58 as 'the most recent version' without naming an edition year. Verifier note (2026-10-04): the Maryland Department of Labor code matrix dated 3/18/2026 lists the 2018 IFGC (effective December 30, 2019) and 2017 NFPA 58 for the Board of Plumbing, while COMAR 09.20.01.01B itself is edition-neutral (most recent version); readers should see both.

Checked against the official source, October 2026: regs.maryland.gov. Subtitle 20 BOARD OF PLUMBING | Library of Maryland Regulations (COMAR 09.20.01 State Plumbing Code)

Verification on October 4, 2026 corrected or newly sourced: fuel gas edition, fuel gas effective date from labor.maryland.gov; scope from regs.maryland.gov.

Massachusetts MA

 Plumbing code   Basis Code written by the state  Edition 248 CMR 10.00 Uniform State Plumbing Code (current revision dated 12/8/2023)  Effective December 8, 2023  State amendments No. Not applicable: the code is written by the Board of State Examiners of Plumbers and Gas Fitters, not a model code with amendments   

 Fuel gas code   Basis NFPA 54, National Fuel Gas Code  Edition 2012 edition  Effective not confirmed  State amendments Yes. 248 CMR 4.00 (Massachusetts Fuel Gas Code) and 248 CMR 5.00 (Amendments to NFPA 54); NFPA 58 (2011) as amended by 248 CMR 8.00   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: Board of State Examiners of Plumbers and Gas Fitters (Massachusetts Division of Occupational Licensure)
Legal cite: M.G.L. c. 142, sections 13 and 21; M.G.L. c. 112, section 61; 248 CMR 10.00
Pending changes: not stated in the source opened

Not confirmed on October 4, 2026:

fuel gas effective date: no effective date for the 2012 NFPA 54 adoption is stated on the pages opened; 248 CMR 4.00 shows a publication date of 04/30/2021 only
legal cite statute text: malegislature.gov was unreachable today; citation taken from the mass.gov regulation pages

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Massachusetts does not use the IPC or UPC; 248 CMR 10.00 is a complete state-written plumbing code enforced by local plumbing and gas inspectors under M.G.L. c. 142. The mass.gov page shows 'Date: 12/08/2023' and the PDF footer reads 12/8/23; this is the date of the current revision as published, used here as the current-edition date. Fuel gas: the Massachusetts Fuel Gas Code (248 CMR 4.00 to 8.00) adopts the 2012 NFPA 54 as modified by 248 CMR 5.00, applying 'throughout the Commonwealth'; the 248 CMR 4.00 page shows Date 04/30/2021 (Mass. Register #1442). The General Laws site (malegislature.gov) could not be reached today, so the statute text of c. 142 section 13 was not opened; the regulation pages cite it as authority.

Checked against the official source, October 2026: www.mass.gov. 248 CMR 10.00: Uniform state plumbing code | Mass.gov

Michigan MI

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition (second printing)  Effective March 12, 2024  State amendments Yes. Michigan Administrative Code, Construction Code Part 7, Plumbing Code (R 408.30701 et seq., 'Amendments and Additions to Basic Plumbing Code'), 2023 MR 22, effective March 12, 2024   

 Fuel gas code   Basis Other arrangement. Michigan amends IPC Section 101.2 so that gas piping is governed by the Michigan Mechanical Code (2021 IMC with Part 9a amendments); the LARA Code Books page lists no separate fuel gas code and the Part 9a rules do not name the IFGC or NFPA 54.  Edition 2021 Michigan Mechanical Code (2021 IMC adopted by R 408.30901a, effective March 12, 2024); no separate state fuel gas code listed  Effective March 12, 2024  State amendments Yes. Michigan Administrative Code, Construction Code Part 9a, Mechanical Code (R 408.30901a et seq.)   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: Michigan Department of Licensing and Regulatory Affairs (LARA), Bureau of Construction Codes (director's rules under the Stille-DeRossett-Hale Single State Construction Code Act)
Legal cite: MCL 125.1504 (1972 PA 230); Mich. Admin. Code R 408.30701 (Rule 701)
Pending changes: not stated in the source opened

Not confirmed on October 4, 2026:

fuel gas code basis detail: whether the IFGC applies in Michigan through the 2021 IMC's internal references was not confirmed; the Part 9a rules opened today do not mention the IFGC or NFPA 54
scope statute: MCL 125.1508b and 125.1504 text (local enforcement, no local amendments) could not be opened today (legislature.mi.gov blocked); scope rests on R 408.30711 wording

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Michigan amends IPC Section 101.2 so that gas piping is governed by the Michigan Mechanical Code (2021 IMC with Part 9a amendments); the LARA Code Books page lists no separate fuel gas code and the Part 9a rules do not name the IFGC or NFPA 54. One- and two-family dwellings and townhouses follow the Michigan Residential Code (2015 edition per LARA, effective February 8, 2016), including its plumbing and gas chapters. The Michigan Plumbing Code applies to buildings 'in this state'; local units of government administer and enforce the state code under the Stille-DeRossett-Hale Act (MCL 125.1501 to 125.1531). The Michigan ARS rules site and legislature.mi.gov blocked access today; rule PDFs were read from michigan.gov.

Checked against the official source, October 2026: www.michigan.gov. Code Books (Michigan LARA, Bureau of Construction Codes)

Minnesota MN

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition 2018 edition  Effective December 17, 2021  State amendments Yes. Minnesota Rules Chapter 4714, Minnesota Plumbing Code (2020 Minnesota Plumbing Code), amending the 2018 UPC chapters 2 to 11, 16, 17 and appendices A, B, I   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2018 edition  Effective April 6, 2020  State amendments Yes. Minnesota Rules 1346.5050 to 1346.6014, Minnesota Fuel Gas Code (part of the 2020 Minnesota Mechanical and Fuel Gas Code), amending IFGC chapters 2 to 8   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: Minnesota Plumbing Board (rules administered by the Minnesota Department of Labor and Industry)
Legal cite: Minn. Stat. 326B.43 subd. 1; 326B.435; Minn. R. 4714.0050
Pending changes: No newer edition adopted. The Plumbing Board has 2024 UPC ad hoc rulemaking committees and states 'There is currently no active rulemaking' (page opened on October 4, 2026). DLI published a Request for Comments on Feb. 2, 2026 on amending Chapter 1346 to incorporate the 2024 IMC and 2024 IFGC; rule draft and effective date 'to be determined'.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The Minnesota Plumbing Code applies to all plumbing installations anywhere in the state (Minn. Stat. 326B.43 subd. 1), unlike most other chapters of the State Building Code, which municipalities enforce only if adopted by ordinance. The 2020 Minnesota Plumbing Code is published by IAPMO as a single reformatted Minnesota code book. Fuel gas is in Minnesota Rules Chapter 1346 (Minnesota Mechanical and Fuel Gas Code), adopting the 2018 IFGC chapters 2 to 8 with Minnesota amendments, effective April 6, 2020. The Plumbing Board is reviewing the 2024 UPC through ad hoc committees but had no active rulemaking on the page opened today.

Checked against the official source, October 2026: www.dli.mn.gov. 2020 Minnesota Plumbing Code | Minnesota Department of Labor and Industry

Mississippi MS

 Plumbing code   Basis No statewide code; cities and counties adopt their own   

 Fuel gas code   Basis No statewide code; cities and counties adopt their own   

Scope: No statewide plumbing code. Each city or county adopts its own.
Adopting agency: No statewide adopting agency for plumbing. The Mississippi Building Codes Council (staffed through the Mississippi Insurance Department / State Fire Marshal) adopts and amends the code editions that counties and municipalities must choose from if they have not opted out; counties and municipalities adopt and enforce plumbing codes locally.
Legal cite: Miss. Code Ann. 17-2-1 et seq. as amended by 2014 S.B. 2378, Section 1; Miss. Code Ann. 19-5-9 (counties); 21-19-25 (municipalities)
Pending changes: not stated in the source opened

Not confirmed on October 4, 2026:

Building Codes Council edition list: no official page listing which IPC or IFGC editions the Mississippi Building Codes Council has adopted could be opened today (mid.ms.gov has no such page; the Council has no site found); therefore no edition is recorded even for localities that must follow the Council list
codified section number of 2014 S.B. 2378 Section 1 in Title 17 Chapter 2 not confirmed from an official code page (official Mississippi Code is hosted on LexisNexis and was not opened)

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Mississippi has no statewide plumbing or fuel gas code applied by a state agency to general construction. Counties and municipalities adopt plumbing and gas codes by local ordinance; under the 2014 law, local governments that did not opt out by Nov. 30, 2014 must use one of the last three editions adopted by the Mississippi Building Codes Council, and many did opt out. A plumber must check the county or city for the edition in force (local pages seen in search results cite 2018 or 2021 I-Codes). The State Fire Marshal enforces the Mississippi Fire Prevention Code and adopted the 2024 IFC and 2024 IBC for its own enforcement as of July 1, 2024 (mid.ms.gov/sfmo/fce), and the factory-built homes regulation (MH-5, effective July 1, 2026) governs modular homes. LP gas is regulated by the State Liquefied Compressed Gas Board (mid.ms.gov/sfmo/lcgas). HB 331 (2024) is cited only for the text of Miss. Code Ann. 19-5-9 as it stood when the bill was drafted; whether that bill passed was not checked.

Checked against the official source, October 2026: billstatus.ls.state.ms.us. SB2378 (As Sent to Governor): 2014 Regular Session, Mississippi Legislature

Missouri MO

 Plumbing code   Basis No statewide code; cities and counties adopt their own   

 Fuel gas code   Basis No statewide code; cities and counties adopt their own   

Scope: No statewide plumbing code. Each city or county adopts its own.
Adopting agency: No statewide adopting agency. Plumbing is regulated by cities (RSMo 341.060) and by first-class county plumbing and sewer inspection departments (RSMo 341.090 to 341.220); there is no state plumbing board or state plumbing code.
Legal cite: RSMo 341.060; RSMo 341.130
Pending changes: not stated in the source opened

Not confirmed on October 4, 2026:

LP gas rule editions: the Missouri Propane Safety Commission rules on sos.mo.gov (Code of State Regulations) could not be opened today; NFPA 58 / NFPA 54 edition not recorded

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Missouri has no statewide building, plumbing or fuel gas code and no statewide plumber license; RSMo chapter 341 directs cities of 15,000 or more and first-class counties to regulate plumbing locally (St. Louis, Kansas City, St. Louis County, Jackson County and others run their own codes and licenses). A plumber must check the city or county for the adopted edition (commonly IPC or UPC editions by local ordinance). LP gas equipment is regulated statewide by the Missouri Propane Safety Commission under RSMo chapter 323 (standards in conformity with NFPA); the Code of State Regulations site (sos.mo.gov) sat behind a bot-check today, so the NFPA 58 and NFPA 54 editions in the commission's rules were not read. Natural gas piping inside buildings has no statewide code.

Checked against the official source, October 2026: revisor.mo.gov. Missouri Revisor of Statutes: Revised Statutes of Missouri, RSMo Section 341.060 (Plumbing regulated by city)

Montana MT

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition 2024 edition  Effective September 26, 2026  State amendments Yes. ARM 24.301.301 (Incorporation by Reference of Uniform Plumbing Code) with Montana amendments; appendices A, B, C, D, K, L, M and N adopted; UPC Chapter 12 (Fuel Piping) deleted and replaced with the IFGC; Chapter 13 deleted except Subsections 1301.0, 1302.0 and 1303.0   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2024 edition  Effective September 26, 2026  State amendments Yes. ARM 24.301.173 (Incorporation by Reference of International Fuel Gas Code) with Montana amendments (references to the International Plumbing Code replaced by the Uniform Plumbing Code)   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: Montana Department of Labor and Industry, Building Codes Program (Business Standards Division)
Legal cite: Mont. Code Ann. 50-60-203; ARM 24.301.301 (UPC); ARM 24.301.173 (IFGC)
Pending changes: not stated in the source opened

Not confirmed on October 4, 2026:

final adopted ARM text: rules.mt.gov required human verification today; edition and effective date are from the DLI Current Codes page, amendment detail from the proposed-rule notice (MAR 2026-95.1)

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Montana moved from the 2021 UPC and 2021 IFGC (effective June 11, 2022) to the 2024 editions effective September 26, 2026, per the DLI Current Codes page. The state Building Codes Program issues plumbing permits and inspects everywhere outside certified city, county and town jurisdictions, which enforce the same state-adopted codes in their areas; farms and ranches, mines, mills, smelters, railroads and public utilities are exempt from state plumbing permits. UPC Chapter 12 is replaced by the IFGC, so gas piping follows the IFGC statewide. The ARM rule text on rules.mt.gov sat behind a human-verification wall today, so the final adopted rule wording was read from the August 2026 proposed-rule notice (strike-and-underline) and the effective date from the DLI Current Codes page.

Checked against the official source, October 2026: bsd.dli.mt.gov. Current Codes (Montana Department of Labor and Industry, Montana Building Codes Program)

Verification on October 4, 2026 corrected or newly sourced: plumbing amendments document from dli.mt.gov.

Nebraska NE

The official page could not be loaded from the research network on October 4, 2026, so no value is shown for Nebraska. The research expected the source to be Nebraska statutes 71-6403, 71-6406 and 18-132 on nebraskalegislature.gov. No adopting agency could be confirmed. Ask the code official where the work is done.

Nevada NV

The official page could not be loaded from the research network on October 4, 2026, so no value is shown for Nevada. The research expected the sources to be NRS 278.580 and 278.582 and NAC 341.045 on leg.state.nv.us and the code compliance page of the State Public Works Division (publicworks.nv.gov). Ask that division or the code official where the work is done.

New Hampshire NH

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2024 edition  Effective July 1, 2026  State amendments Yes. New Hampshire State Building Code Amendments, effective July 1, 2026 (Summary of NH Building Code Amendments (July 1, 2026), Building Code Review Board, amendments approved as of October 10, 2025 and ratified by statute)   

 Fuel gas code   Basis NFPA 54, National Fuel Gas Code  Edition 2024 edition  Effective July 27, 2026  State amendments Yes. 2024 NFPA 54 as amended by Saf-FMO 300 (State Fire Code).   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code.
Adopting agency: New Hampshire Building Code Review Board (Department of Safety, Division of Fire Safety / State Fire Marshal), with ratification by the General Court
Legal cite: RSA 155-A:1 IV (definition of New Hampshire building code); RSA 155-A:2 (applicability); RSA 155-A:10 (amendments and ratification); HB1159-2026 (ratification of 2024 codes)
Pending changes: Six-month concurrence period July 1 to December 31, 2026 during which permit applications may be submitted under either the 2021 IPC or the 2024 IPC with NH amendments; beginning January 1, 2027 all permit requests must follow the 2024 codes.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The State Building Code 'applies in every municipality statewide and sets forth the minimum requirements for all buildings and structures.' A municipality that enforces the code must adopt an ordinance confirmed by the Building Code Review Board; the ordinance 'may include local amendments to the state building code, provided they are not less stringent' and 'As of July 1, 2026, local amendments are limited to administrative matters.' Prior edition: 2021 IPC with NH amendments effective July 1, 2024 (HB1059-2024), still allowable during the concurrence period through December 31, 2026 (Historical Adoption Dates page, https://www.firemarshal.dos.nh.gov/historical-adoption-dates-nh-state-building-code). NH does not adopt the IFGC; fuel gas is covered by the State Fire Code: the Fire Codes Adopted page (https://www.firemarshal.dos.nh.gov/fire-codes-adopted-nh) lists '2024 NFPA 54, National Fuel Gas Code, as amended by Saf-FMO 300' with 'Effective date: July 27, 2026', under RSA 153:1 VI-a (NFPA 1 and NFPA 101, 2024 editions). The RSA text itself on gc.nh.gov / gencourt.state.nh.us returned HTTP 403 or empty replies today; the RSA citations above are taken from the Division of Fire Safety pages, which quote RSA 155-A and RSA 153:1 VI-a.

Checked against the official source, October 2026: www.firemarshal.dos.nh.gov. State Building Code | NH Division of Fire Safety

New Jersey NJ

 Plumbing code   Basis National Standard Plumbing Code (NSPC)  Edition 2024 edition (National Standard Plumbing Code/2024, New Jersey edition)  Effective August 17, 2026  State amendments Yes. N.J.A.C. 5:23-3.15 (plumbing subcode) New Jersey edition modifications to the NSPC/2024   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2024 edition  Effective August 17, 2026  State amendments not stated in the source opened   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: New Jersey Department of Community Affairs, Division of Codes and Standards (Commissioner adopts the Uniform Construction Code subcodes)
Legal cite: N.J.A.C. 5:23-3.15 (plumbing subcode); N.J.A.C. 5:23-3.22 (fuel gas subcode); N.J.S.A. 52:27D-119 et seq. (State Uniform Construction Code Act), especially 52:27D-123
Pending changes: None stated beyond the standard grace period: for six months after the August 17, 2026 operative date, a complete permit application may be reviewed under the code in force immediately before the subcode revision (NSPC/2021 NJ ed and IFGC/2021), per the DCA Grace Period note.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Fuel gas row on the same page: 'FUEL GAS SUBCODE (NJAC 5:23-3.22) International Fuel Gas Code/2024 [omitted] Aug 17, 2026'. The previous codes page (https://www.nj.gov/dca/codes/codreg/previous.shtml) says 'Prior to the adoption of the 2024/2023 codes August 17, 2026' the plumbing subcode was NSPC/2021 NJ ed (adopted Sept. 19, 2022) and the fuel gas subcode IFGC/2021 (Sept. 06, 2022), and states the grace period rule: 'For a period of six months following the operative date of a subcode revision, applicants may submit a complete permit application, including all prior approvals, to be reviewed under the code in force immediately preceeding the subcode revision.' Statewide mandatory: the State Uniform Construction Code Act findings (N.J.S.A. 52:27D-122(b), DCA copy at https://www.nj.gov/dca/codes/codreg/pdf_regs/52_27D_119.pdf) state that the way to insure uniform construction standards 'throughout the State of New Jersey' is 'to adopt a uniform State construction code', and 52:27D-123(b) requires the plumbing subcode to be an adoption of the National Standard Plumbing Code. Municipalities enforce the UCC but do not adopt their own technical codes.

Checked against the official source, October 2026: www.nj.gov. New Jersey Department of Community Affairs | Current Construction Codes

New Mexico NM

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition 2024 edition (2024 New Mexico Plumbing Code, 14.8.2 NMAC)  Effective August 1, 2026  State amendments Yes. 14.8.2 NMAC, 2024 New Mexico Plumbing Code (NMPC), which adopts the 2024 UPC by reference 'as amended by this rule'   

 Fuel gas code   Basis Uniform Plumbing Code, Chapter 12 (fuel gas piping)  Edition 2024 edition (UPC chapter 12 as adopted in 14.8.2.22 NMAC; UMC 2024 chapter 13 as adopted in 14.9.2.21 NMAC)  Effective August 1, 2026  State amendments Yes. 14.8.2.22 NMAC, Chapter 12 Fuel Gas Piping with New Mexico amendments; 14.9.2.21 NMAC (2024 UMC chapter 13).   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code.
Adopting agency: Construction Industries Division (CID) of the New Mexico Regulation and Licensing Department (Mechanical and Plumbing Bureau)
Legal cite: 14.8.2 NMAC (statutory authority NMSA 1978 Sections 60-13-9, 60-13-33, 60-13-44, 60-13-45, 60-13-46, 60-13-47); fuel gas also 14.9.2 NMAC
Pending changes: Transition: 'From the date of publication of this rule in the New Mexico register, until January 1, 2027, permits may be issued under either the previously adopted rule, or this rule. After January 1, 2027, permits may be issued only under this rule.' (2021 NMPC remains usable for permits until January 1, 2027.)

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

CID page (https://www.rld.nm.gov/construction-industries/rules-laws-and-building-codes/, title 'NMRLD | Rules, Laws, and Building Codes') lists '2024 New Mexico Plumbing Code NMAC 14.8.2 EFFECTIVE DATE: August 1, 2026' and '2024 New Mexico Mechanical Code NMAC 14.9.2 EFFECTIVE DATE: August 1, 2026' with the same transition wording. 14.8.2.5 NMAC: 'EFFECTIVE DATE: August 1, 2026'. 14.8.2.2 NMAC scope: applies to all contracting work performed in New Mexico on or after August 1, 2026 that is subject to CID jurisdiction. 14.8.2.10 NMAC defines the authority having jurisdiction as 'the CID and the mechanical-plumbing trade bureau chief for adoption, enactment, interpretation and enforcement of the state adopted plumbing code as the minimum requirement for the state of New Mexico', which is why scope is recorded as a statewide minimum; the local-amendment mechanism under NMSA 1978 Section 60-13-44 was not opened today. Fuel gas: NM keeps UPC Chapter 12 Fuel Gas Piping in the plumbing code (14.8.2.22 NMAC) and UMC Chapter 13 Fuel Gas Piping in the 2024 New Mexico Mechanical Code (14.9.2.21 NMAC, adopts the 2024 UMC by reference, effective August 1, 2026, same transition); NM does not adopt the IFGC. The CID also has an LP Gas Bureau with separate LP Gas rules (not reviewed).

Checked against the official source, October 2026: prod-rf-lambda.rtssaas.com, the New Mexico Administrative Code document linked from the official CID Rules, Laws and Building Codes page. 14.8.2 NMAC, Title 14 Housing and Construction, Chapter 8 Plumbing Codes, Part 2, 2024 New Mexico Plumbing Code (linked from the CID Rules, Laws, and Building Codes page)

Verification on October 4, 2026 corrected or newly sourced: scope from www.rld.nm.gov.

New York NY

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2024 edition (as the 2025 Plumbing Code of New York State, publication date July 2025)  Effective December 31, 2025  State amendments Yes. 2025 Plumbing Code of New York State (state-specific text incorporated by reference in 19 NYCRR Part 1222, plus amendments listed in 19 NYCRR 1222.2(e))   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2024 edition (as the 2025 Fuel Gas Code of New York State, publication date July 2025)  Effective December 31, 2025  State amendments Yes. 2025 Fuel Gas Code of New York State (state-specific text), with amendments in 19 NYCRR Part 1224.   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code. The DOS Code Council page states 'The Uniform Code applies to all buildings and structures in New York State except for those located within the City of New York' (NYC has its own construction codes, including the NYC Plumbing Code). Every city, town, village or county administers and enforces the Uniform Code locally (19 NYCRR Part 1203).
Adopting agency: New York State Fire Prevention and Building Code Council; Department of State, Division of Building Standards and Codes
Legal cite: 19 NYCRR Part 1222 (Plumbing Systems), section 1222.2; 19 NYCRR Part 1219 (definitions); Executive Law Article 18 (Uniform Fire Prevention and Building Code Act); fuel gas 19 NYCRR Part 1224
Pending changes: No newer edition pending. Note: implementation of the 2025 provisions prohibiting fossil-fuel equipment in new buildings (19 NYCRR 1240.6 and Subpart 1229-2) 'continues to be suspended by Court Order' and 'are neither effective nor enforceable' (DOS update dated July 2, 2026).

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The Notice of Adoption page lists the publications incorporated by reference into the amended Uniform Code, including '2025 Plumbing Code of New York State (publication date: July 2025)' and '2025 Fuel Gas Code of New York State (publication date: July 2025)'. 19 NYCRR 1222.2(a) (PDF at https://dos.ny.gov/system/files/documents/2026/02/19-nycrr-part-1222-2025_0.pdf): plumbing systems 'shall comply with the provisions and requirements of the 2025 PCNYS'; 19 NYCRR 1224.2(a): fuel gas piping and equipment 'shall comply with the provisions and requirements of the 2025 FGCNYS'. Model code basis: the DOS Regulatory Impact Statement for the rule (https://dos.ny.gov/system/files/documents/2025/06/appendix-b-ris-uniform-code.pdf) says the rule adopts 'new text based primarily upon the 2024 editions of model codes developed and published by the ICC, but which incorporates New York State-specific requirements' (the books were named 2024 PCNYS etc. at proposal and published as the 2025 editions). Previous edition: 2020 Plumbing Code of NYS effective May 12, 2020. Local scope: DOS Code Council page (https://dos.ny.gov/state-fire-prevention-and-building-code-council/) states 'The Uniform Code applies to all buildings and structures in New York State except for those located within the City of New York' (NYC has its own construction codes, including the NYC Plumbing Code) and that 'Executive Law section 379 and Energy Law section 11-109 individually provide a process for adoption of more restrictive standards for construction to the Uniform Code', with the Code Council empowered 'to adopt higher or more restrictive local standards upon the recommendation of local governments'. Every city, town, village or county administers and enforces the Uniform Code locally (19 NYCRR Part 1203).

Checked against the official source, October 2026: dos.ny.gov. Notice of Adoption | Department of State (Building Standards and Codes)

North Carolina NC

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2015 edition (as the 2018 North Carolina Plumbing Code)  Effective January 1, 2019  State amendments Yes. 2018 North Carolina Plumbing Code amendments (2018 NC Ad-Hoc Committee amendments adopted by the Building Code Council and approved by the Rules Review Commission)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2015 edition (as the 2018 North Carolina Fuel Gas Code)  Effective January 1, 2019  State amendments Yes. 2018 North Carolina Fuel Gas Code (2015 IFGC with NC Ad-Hoc Committee amendments).   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: North Carolina Building Code Council; Office of State Fire Marshal (OSFM), Codes and Interpretations Section
Legal cite: G.S. 143-138 (North Carolina State Building Code); S.L. 2024-57 and S.L. 2025-2 section 5.12(b) (delayed effective date of the 2024 Code); 2018 NC Administrative Code and Policies section 102.5
Pending changes: 2024 North Carolina Plumbing Code (2021 IPC with NC Amendments) and 2024 NC Fuel Gas Code (2021 IFGC with NC Amendments) have been adopted by the Building Code Council and approved by the Rules Review Commission but are not yet effective: per S.L. 2025-2 section 5.12(b) they become effective 12 months after the State Fire Marshal certifies that the code has been published and distributed and that the Residential Code Council is fully constituted. No certification date was found on OSFM pages on October 4, 2026. Until then the 2024 Code may be used as an alternate method of construction at the owner's request (2018 NC Administrative Code section 102.5).

Not confirmed on October 4, 2026:

scope detail: whether local governments may adopt amendments (G.S. 143-138(e)) not opened today because ncleg.gov blocked access; main statewide status is verified via OSFM

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

State Fire Marshal letter of March 31, 2025 (https://www.ncosfm.gov/letter-re-2024-state-building-code-effective-date/open): 'Until the to-be-determined effective date of the 2024 Code, the 2018 North Carolina State Building Code remains in full force and should continue to be enforced as the governing standard, unless a building owner or his agent requests that the 2024 Code be applied to the project.' The OSFM document '2025-0403 Rules Review Commission links to the 2024 North Carolina State Building Code' lists '2024 North Carolina Plumbing Code (2021 IPC with NC Amendments)' and '2024 North Carolina Fuel Gas Code (2021 IFGC with NC Amendments)'. OSFM press releases through September 2026 contain no notice of the State Fire Marshal certification, so the 2024 Code is treated as still pending. The NC General Assembly statute site (ncleg.gov, G.S. 143-138) returned a Cloudflare block today, so the local-amendment rule in G.S. 143-138(e) was not read; scope is recorded as statewide on the basis of the OSFM statements that the 2018 State Building Code is the governing standard enforced by local code officials.

Checked against the official source, October 2026: www.ncosfm.gov. Codes: Current and Past | OSFM

North Dakota ND

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition 2018 edition (as the 2018 North Dakota Plumbing Code)  Effective April 1, 2020  State amendments Yes. N.D. Admin. Code Article 62-03.1, Plumbing Installation Standards (adopts only chapters 1, 2, 3, 4, 6, 7, 8, 9, 10, 11 and 17 and appendices A, B, C, D, E, I and M of the 2018 UPC, plus chapter 62-03.1-03 on private sewage disposal)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC). Gas piping falls under the State Building Code (IRC, IMC, IFGC), which is local-option: 'If a city, county, or township elects to adopt and enforce building codes, it must adopt and enforce the State Building Code. However, a jurisdiction is permitted to further amend the State Building Code to conform to local needs.' So the fuel gas scope is local-option (statewide code only where a jurisdiction enforces building codes), while the plumbing code is statewide.  Edition 2024 edition (with North Dakota amendments, as part of the North Dakota State Building Code effective January 1, 2026)  Effective January 1, 2026  State amendments Yes. 2026 North Dakota State Building Code, Section 14: 2024 International Fuel Gas Code Amendments.   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: North Dakota State Plumbing Board
Legal cite: N.D. Admin. Code 62-03.1-01-01 (general authority and law implemented: N.D.C.C. 43-18-09); fuel gas: N.D.C.C. 54-21.3-03 and the North Dakota State Building Code
Pending changes: None found for plumbing. State Building Code (including the 2024 IFGC) took effect January 1, 2026.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Statewide: 62-03.1-01-01(2): 'All plumbing as defined in North Dakota Century Code section 43-18-01, including materials, must meet or exceed the minimum provisions of this article and the North Dakota Plumbing Code.' The ND Plumbing Code omits UPC chapter 5 (water heaters), chapter 12 (fuel gas piping) and chapters 13 to 16; water heaters and gas piping fall under the State Building Code (IRC, IMC, IFGC) where a local jurisdiction enforces it. Fuel gas: the Division of Community Services page (https://www.commerce.nd.gov/community-services/building-codes, 'Building Codes | Commerce | North Dakota') states 'The North Dakota Legislative Assembly has mandated that the state building code consist of the International Building Code (IBC), International Residential Code (IRC), International Mechanical Code (IMC), and International Fuel Gas Code (IFGC)' and 'The new North Dakota State Building Code will go into effect Jan. 1, 2026'; the 2026 ND State Building Code book (https://www.medialibrary.nd.gov/assetbank-nd/assetfile/156311.pdf) says 'Effective January 1, 2026, the North Dakota State Building Code consists of the 2024 International Building Code (IBC), International Residential Code (IRC), International Mechanical Code (IMC), International Fuel Gas Code (IFGC), International Energy Conservation Code, and the International Existing Building Code' and includes a section of 2024 IFGC amendments. The State Building Code is local-option: 'If a city, county, or township elects to adopt and enforce building codes, it must adopt and enforce the State Building Code. However, a jurisdiction is permitted to further amend the State Building Code to conform to local needs.' The book also instructs: 'Wherever the International Plumbing Code and International Electrical Code are referenced, you must substitute the reference with the North Dakota State Plumbing Code and the Wiring Standards of North Dakota.' So the fuel gas scope is local-option (statewide code only where a jurisdiction enforces building codes), while the plumbing code is statewide. The 2018 UPC remains the current edition; no rule change adopting the 2021 or 2024 UPC was found on ndlegis.gov or ndplumbingboard.gov today.

Checked against the official source, October 2026: ndlegis.gov. North Dakota Administrative Code, Article 62-03.1 Plumbing Installation Standards, Chapter 62-03.1-01 Administration (Legislative Council)

Ohio OH

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition (Ohio Plumbing Code 2024, OAC 4101:3-1 to 4101:3-15)  Effective March 1, 2024  State amendments Yes. Ohio Plumbing Code, OAC Chapters 4101:3-1 to 4101:3-15 (Amendments Group 100 effective March 1, 2024; Amendments Group 105 effective October 15, 2025)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition not confirmed  Effective not stated in the source opened  State amendments not stated in the source opened   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: Ohio Board of Building Standards, Ohio Department of Commerce (Division of Industrial Compliance)
Legal cite: OAC 4101:3-1-01 section 101.1 (Ohio Plumbing Code); OAC 4101:1-1-01 sections 101.4.1 and 102.2 (Ohio Building Code); ORC 3781.10, 3781.11
Pending changes: not stated in the source opened

Not confirmed on October 4, 2026:

fuel gas edition: no Ohio rule text opened today names an IFGC edition; cell stays empty
codes.ohio.gov (official OAC host) timed out today; Board rule PDFs used instead

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The Ohio Plumbing Code (OPC) applies to all buildings under the Ohio Building Code. Detached one-, two- and three-family dwellings fall under the Residential Code of Ohio (OAC 4101:8), which has its own plumbing chapters. Fuel gas: Ohio does not adopt the IFGC as a stand-alone code; OBC section 101.4.1 applies the IFGC to gas piping from the point of delivery and to gas appliances. The Ohio rule does not state an IFGC edition; OBC chapter 35 (OAC 4101:1-35-01) incorporates IBC 2021 Chapter 35 referenced standards and Ohio's modification list does not change the IFGC entry, so the edition is the one listed by IBC 2021. Welding and brazing of fuel gas piping is governed by ORC 4104.44 (OMC 301.6 exception). OBC 102.2 lets municipal corporations adopt further regulations not in conflict with the Board's rules; Board approvals of products are valid anywhere in Ohio. codes.ohio.gov (the official OAC host) refused connections today; the Board's own rule PDFs were used instead. Amendments Group 105 (effective 2025-10-15) kept IPC 2021 as the base and made editorial and technical changes (for example, 2024 IPC language on plastic water heater pans in section 504.7).

Checked against the official source, October 2026: dam.assets.ohio.gov. Amendments Group 105: OPC Amendments Effective October 15, 2025 (Ohio Board of Building Standards), rule 4101:3-1-01 Administration

Oklahoma OK

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2024 edition  Effective September 14, 2026  State amendments Yes. OAC Title 748, Chapter 20, Subchapter 16 (748:20-16-1 through 748:20-16-20), International Plumbing Code 2024 Edition as amended and modified   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2024 edition  Effective September 14, 2026  State amendments Yes. OAC Title 748, Chapter 20, Subchapter 12 (748:20-12-1 through 748:20-12-13), IFGC 2024 as amended and revised.   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code.
Adopting agency: Oklahoma Uniform Building Code Commission (OUBCC)
Legal cite: OAC 748:20-16-1 and 748:20-16-2; 59 O.S. 1000.23; 59 O.S. 1000.29
Pending changes: not stated in the source opened

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The IPC 2024 is adopted as the statewide minimum code for commercial plumbing construction. Residential plumbing (one- and two-family dwellings and townhouses) follows the plumbing chapters of the Oklahoma-adopted IRC 2024, also effective September 14, 2026. The OUBCC expressly chose not to adopt the 2021 IPC or 2021 IFGC for any purpose; the 2018 editions were in force from September 14, 2021 until September 14, 2026. No IPC appendices are adopted statewide, but local jurisdictions may adopt appendices A through F and Resource A under 59 O.S. 1000.29. Local jurisdictions may amend the statewide minimum code only as allowed by Oklahoma law and OAC Title 748, Chapter 15 (more stringent local amendments). ICC errata are not adopted; only the first printing is adopted. The OUBCC notes that its website copies are unofficial and the official text is in the Oklahoma Administrative Code and Oklahoma Register.

Checked against the official source, October 2026: oklahoma.gov. Title 748: Oklahoma Uniform Building Code Commission, Chapter 20: Adopted Codes, Subchapter 16, International Plumbing Code, 2024 Edition (IPC 2024), 748:20-16-1 through 748:20-16-20

Oregon OR

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition 2024 edition (2026 Oregon Plumbing Specialty Code)  Effective October 1, 2026  State amendments Yes. 2026 Oregon Plumbing Specialty Code (OPSC), Oregon amendments by the Building Codes Division (OAR 918-750-0110(2)(d))   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2024 edition (2025 Oregon Mechanical Specialty Code, IMC 2024 and IFGC 2024 as amended)  Effective October 1, 2025  State amendments Yes. 2025 Oregon Mechanical Specialty Code (2024 IMC and 2024 IFGC as amended by the Building Codes Division), OAR 918-440-0010.   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: Oregon Building Codes Division, Department of Consumer and Business Services
Legal cite: OAR 918-750-0110; OAR 918-750-0100; ORS 447.020, 455.020, 455.030, 455.040, 455.110
Pending changes: not stated in the source opened

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The 2026 OPSC took effect October 1, 2026, two days before this check; the previous 2023 OPSC (based on UPC 2021) was effective October 1, 2023. UPC Chapter 12 (Fuel Gas Piping) is not adopted in Oregon; fuel gas is covered by the Oregon Mechanical Specialty Code, which since October 1, 2025 is based on IMC 2024 and IFGC 2024 (phase-in with the 2022 OMSC ended March 31, 2026). The OPSC covers plumbing in one- and two-family dwellings too (not the residential code). Local governments cannot enact conflicting plumbing rules unless the division approves a local amendment request under ORS 455.040; UPC appendices L and N may be adopted locally. In the source quote the rule's ranges are written with hyphens or the word 'to' instead of the dash characters used on the SOS page.

Checked against the official source, October 2026: secure.sos.state.or.us. Oregon Secretary of State Administrative Rules, OAR 918-750-0110 Oregon Plumbing Specialty Code

Pennsylvania PA

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition  Effective January 1, 2026  State amendments Yes. 34 Pa. Code Chapter 403 (Uniform Construction Code), section 403.21(a)(6) exceptions and other UCC regulations   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2021 edition  Effective January 1, 2026  State amendments not stated in the source opened   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code. 34 Pa. Code 403.21(a)(6) adopts the International Plumbing Code of 2021 except: '(i) A municipality within a county of the second class may not administer and enforce the "International Plumbing Code" adopted under this chapter. (ii) A municipality within a county of the second class that has adopted a plumbing code and accompanying rules and regulations under the Local Health Administration Law (16 P.S. 12001 to 12030) shall retain the authority to promulgate and enforce this plumbing code and to make any changes it deems necessary if the changes meet the Uniform Construction Code's minimum requirements.' Municipalities in a county of the second class (Allegheny County) may not enforce the IPC under the UCC; a county plumbing code adopted under the Local Health Administration Law applies there.
Adopting agency: Pennsylvania Department of Labor and Industry (Uniform Construction Code)
Legal cite: 34 Pa. Code 403.21(a)(4) and (a)(6); Pennsylvania Construction Code Act, 35 P.S. 7210.301 to 7210.304 and 7210.503
Pending changes: not stated in the source opened

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The 2021 I-codes replaced the 2018 editions (effective February 14, 2022) on January 1, 2026 (55 Pa.B. 7701). The UCC is a statewide code; municipalities elect whether to administer and enforce it (34 Pa. Code 403.102), otherwise L&I or third-party agencies do. Municipalities may adopt stricter provisions only through ordinances reviewed by L&I under 35 P.S. 7210.503(b). Municipalities in a county of the second class (Allegheny County) may not enforce the IPC under the UCC; a county plumbing code adopted under the Local Health Administration Law applies there. One- and two-family dwellings follow the plumbing chapters of the IRC 2021 as adopted in 403.21(a)(7). Section 403.21(e): individual on-lot sewage systems are governed by 25 Pa. Code Chapter 73. The Pennsylvania Code site states it reflects changes effective through 56 Pa.B. 5370 (August 8, 2026).

Checked against the official source, October 2026: www.pacodeandbulletin.gov. 34 Pa. Code 403.21. Uniform Construction Code. (Pennsylvania Code and Bulletin)

Rhode Island RI

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition (RISBC-3 Rhode Island Plumbing Code)  Effective December 1, 2025  State amendments Yes. 510-RICR-00-00-3, RISBC-3 Rhode Island Plumbing Code (state amendments by chapter; only IPC Appendix E adopted)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2021 edition (RISBC-19 Rhode Island Fuel Gas Code)  Effective December 1, 2025  State amendments Yes. 510-RICR-00-00-19, RISBC-19 Rhode Island Fuel Gas Code (Rhode Island amendments; appendices A, B, C adopted, D and E deleted).   

Scope: not confirmed
Adopting agency: Rhode Island Building Code Standards Committee (Building Code Commission, Department of Business Regulation)
Legal cite: 510-RICR-00-00-3 section 3.2; R.I. Gen. Laws 23-27.3-100.1.5 and 23-27.3-109.1
Pending changes: The rulemaking record says the 2021 adoption is meant to prepare the state to adopt the 2024 codes within a year to 18 months, but no 2024 adoption was found on the regulation page on October 4, 2026.

Not confirmed on October 4, 2026:

scope: R.I. Gen. Laws 23-27.3-100.1.5 and 23-27.3-109.1 could not be opened (webserver.rilegislature.gov connection refused today); classification rests on the regulation text

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The 2021 IPC replaced the 2018 IPC (in force February 1, 2022 to December 1, 2025). Only IPC Appendix E is adopted; all other appendices are deleted. State amendment in Chapter 11: all combined drains and sewer systems need approval of the local or regional sewer authority. The rulemaking record says the 2021 adoption is meant to prepare the state to adopt the 2024 codes within a year to 18 months, but no 2024 adoption was found on the regulation page today. One- and two-family dwellings use the plumbing chapters of the IRC 2021 as adopted in RISBC-2. Fuel gas: RISBC-19 adopts IFGC 2021 with Rhode Island amendments (appendices A, B, C adopted; D and E deleted).

Checked against the official source, October 2026: rules.sos.ri.gov. RISBC-3 Rhode Island Plumbing Code: Rhode Island Department of State (510-RICR-00-00-3)

South Carolina SC

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition (2021 South Carolina Plumbing Code; enforced by local jurisdictions until the Council's January 1, 2027 implementation date for the 2024 edition, whose regulation was published as final on May 22, 2026)  Effective not confirmed  State amendments Yes. S.C. Code of Regulations Chapter 8, Article 14, 8-1400 et seq., 2021 International Plumbing Code Modification Summary   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2021 edition (2021 South Carolina Fuel Gas Code; 2024 edition regulation published as final May 22, 2026, Council enforcement date January 1, 2027)  Effective May 27, 2022  State amendments Yes. S.C. Code of Regulations Chapter 8, Article 10, 8-1000 et seq., International Fuel Gas Code Modification Summary.   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions.
Adopting agency: South Carolina Building Codes Council, Department of Labor, Licensing and Regulation
Legal cite: S.C. Code Ann. 6-9-40 and 6-9-50; S.C. Code Regs. 8-236, 8-1000 (fuel gas) and 8-1400 (plumbing)
Pending changes: 2024 IPC and 2024 IFGC adopted: the Building Codes Council's Document No. 5416 (Chapter 8, Article 14, International Plumbing Code, 2024 Edition) and Document No. 5427 (Article 10, International Fuel Gas Code, 2024 Edition) were approved by the General Assembly and published as Final Regulations in the South Carolina State Register Vol. 50, Issue 5, May 22, 2026 (final regulations take effect on publication). The Council's effective date for enforcement purposes is January 1, 2027 (Plan for Implementation in the proposed regulation, State Register Vol. 49, Issue 10, October 24, 2025, under S.C. Code 6-9-40(A)(4)). Local jurisdictions enforce the 2021 editions until that implementation date (Reg. 8-236(B)).

Not confirmed on October 4, 2026:

plumbing effective date: the Council's implementation date for local enforcement of the 2021 codes is published only on llr.sc.gov (connection refused again today); the date recorded is the regulation's own effective date from the State Register history line
Any post-May 2026 Council notice confirming the January 1, 2027 enforcement date on llr.sc.gov could not be opened

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

South Carolina codes are adopted by the state Building Codes Council and enforced by counties and municipalities; local jurisdictions may not write their own building codes (Reg. 8-236(C)), and only the Council's statewide modifications apply. The plumbing effective date given is the legal effective date of the Council's 2021 IPC modification regulation (SCSR 46-5, May 27, 2022); the Council's separate implementation date for local enforcement of the 2021 codes is posted on llr.sc.gov, which could not be reached today. Residential plumbing follows the IRC 2021 as modified by the Council (Chapter 8 Article 12 area). The 2024 editions (IPC, IFGC, IRC and others) were proposed in October 2025 with Council-approved enforcement date January 1, 2027; the compiled Chapter 8 PDF opened today (server last-modified September 23, 2025) still shows the 2021 editions as current. LLR Building Codes Council pages (llr.sc.gov) refused connections from this location today, so the Legislature's official regulation compilation and State Register were used.

Checked against the official source, October 2026: www.scstatehouse.gov. S.C. Code of Regulations, Chapter 8, Building Codes Council (South Carolina Legislature)

Verification on October 4, 2026 corrected or newly sourced: pending change, fuel gas edition from www.scstatehouse.gov; plumbing code edition from www.scstatehouse.gov.

South Dakota SD

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition 2024 edition  Effective October 28, 2025  State amendments Yes. ARSD 20:54:02:01 Conformance with uniform code: Exceptions (58 numbered exceptions and deletions to UPC 2024, including Chapter 5 and Chapters 12 to 14 not adopted)   

 Fuel gas code   Basis not confirmed   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code.
Adopting agency: South Dakota State Plumbing Commission, Department of Labor and Regulation
Legal cite: SDCL 36-25-15; SDCL 36-25-16; ARSD 20:54:02:01
Pending changes: not stated in the source opened

Not confirmed on October 4, 2026:

fuel gas code basis 'none-statewide' rests on the exclusion of UPC Chapter 12 in ARSD 20:54:02:01, the local-option building code statutes in SDCL 11-10, and the State Fire Marshal rules in ARSD 61:15:01, which adopt the IBC, IFC and IMC 2015 editions as fire safety standards without adopting the IFGC or NFPA 54; no official page states in words that South Dakota has no statewide fuel gas code
52 SDR 106 (effective May 25, 2026): the Register notice describing this later amendment to 20:54:02:01 was not opened

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The State Plumbing Code is the UPC 2024 with extensive South Dakota exceptions (ARSD 20:54:02:01), including deeper burial: water service 72 inches of cover, building sewers 42 inches, and no water piping in exterior walls or unheated attics. UPC Chapter 5 (water heaters) and Chapters 12 to 14 (fuel gas piping, health care facilities, firestop protection) are excluded. Municipalities may adopt their own plumbing ordinances if they meet the state minimum (SDCL 36-25-16); a commission registrant may work in a municipality for six months while a local permit or license is pending. Fuel gas: no statewide fuel gas code was found; the Plumbing Commission expressly excludes UPC Chapter 12, and building codes are a local matter under SDCL 11-10 (IBC 2024 is the default non-residential design standard from July 1, 2026 where no local ordinance exists; municipalities may adopt the IRC 2024 for one- and two-family dwellings). The rule history shows amendments effective October 28, 2025 (52 SDR 42) and May 25, 2026 (52 SDR 106); which of these moved the rule from the prior UPC edition to 2024 is not stated in the rule text, so the effective date cell is left empty.

Checked against the official source, October 2026: sdlegislature.gov. Rule 20:54:02:01 Conformance with uniform code: Exceptions (South Dakota Legislature, Administrative Rules)

Verification on October 4, 2026 corrected or newly sourced: plumbing effective date from dlr.sd.gov.

Tennessee TN

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition  Effective April 17, 2025  State amendments not confirmed   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2021 edition  Effective April 17, 2025  State amendments No. Tenn. Comp. R. & Regs. 0780-02-02-.01(1)(b) adopts the IFGC 2021 without listed changes.   

Scope: Mixed arrangement for the plumbing code, see the note. Statewide minimum for buildings under State Fire Marshal jurisdiction; exempt local jurisdictions enforce their own adopted codes (within seven years of the current edition) and may not be less stringent without Division approval; one- and two-family dwellings under IRC 2018 with county and municipal opt-out of state residential inspections
Adopting agency: Tennessee State Fire Marshal's Office, Division of Fire Prevention, Department of Commerce and Insurance
Legal cite: Tenn. Comp. R. & Regs. 0780-02-02-.01(1)(b) and (1)(d); 0780-02-02-.05; T.C.A. 68-102-113 and 68-120-101
Pending changes: not stated in the source opened

Not confirmed on October 4, 2026:

plumbing amendments false: rule 0780-02-02-.01(1)(d) lists no Tennessee changes to the IPC 2021; no separate amendment document was searched for beyond the rule chapter and the Fire Marshal page

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The State Fire Marshal's Office adopted the 2021 IPC and 2021 IFGC effective April 17, 2025 (replacing the 2012 editions adopted August 4, 2016 for state-inspected buildings). Tennessee is not a single-code state in practice: exempt jurisdictions (cities and counties with their own certified codes programs under T.C.A. 68-120-101(b)) enforce the codes they adopt, which must be within seven years of the current edition and not less stringent than the state rule without Division approval; plumbers should check the local jurisdiction's adopted edition. One- and two-family dwellings and townhouses fall under the IRC 2018 (state residential rule 0780-02-23) and its plumbing and fuel gas chapters; counties and municipalities may opt out of the state residential program. The LP-gas rules in 0780-02-17 and portable extinguisher rules in 0780-02-14 prevail over conflicting adopted code provisions. The rule PDF host (publications.tnsosfiles.com) returned 403 to automated fetches and the file was retrieved with browser headers.

Checked against the official source, October 2026: publications.tnsosfiles.com, the Tennessee Secretary of State, Division of Publications, rule PDF host. Rules of the Tennessee Department of Commerce and Insurance, Division of Fire Prevention, Chapter 0780-02-02 Codes and Standards (April 2025, Revised)

Texas TX

 Plumbing code   Basis Other arrangement. Both the UPC and the IPC are adopted by the state board; each political subdivision adopts one of them for its jurisdiction.  Edition 2018 edition (2018 UPC and 2018 IPC, both adopted by the Board)  Effective not confirmed  State amendments No. None at state level. 22 TAC 367.2(a) adopts the 2018 UPC and 2018 IPC as published; 367.2(b) lets a political subdivision adopt a plumbing code with local amendments that do not substantially vary from state rules or laws.   

 Fuel gas code   Basis International Fuel Gas Code (IFGC). 2018 IFGC adopted as a code incorporated by reference in the 2018 IPC (22 TAC 367.2(a)(2)(A)). Where a political subdivision uses the UPC, UPC chapter 12 applies. LP-gas piping must also follow Texas Railroad Commission rules (22 TAC 367.2(c)(3)).  Edition 2018 edition  Effective not stated in the source opened  State amendments No. None at state level; 22 TAC 367.2(a)(2)(A) adopts the 2018 IFGC as incorporated in the 2018 IPC, as published; political subdivisions may amend locally.   

Scope: Mixed arrangement for the plumbing code, see the note. Mixed. Plumbing must follow the code adopted by the political subdivision where the work is done (UPC or IPC, with local amendments). In unincorporated areas or where no local code is adopted, licensees must install to one of the two Board-adopted 2018 codes.
Adopting agency: Texas State Board of Plumbing Examiners (TSBPE)
Legal cite: 22 Tex. Admin. Code 367.2 (Code Requirements); Texas Occupations Code ch. 1301 (Plumbing License Law) cited as authority in the Board rules
Pending changes: Proposed amendment to 22 TAC 367.2 to replace the 2018 UPC and 2018 IPC with the 2021 UPC and 2021 IPC, published in the Texas Register issue of August 14, 2026 (filed July 31, 2026, TRD-202603248), earliest possible date of adoption September 13, 2026, 30 day comment period. Not yet adopted: the October 2, 2026 Texas Register adopted-rules section for Title 22 contains no TSBPE adoption, and the TSBPE March 2026 rule compilation still shows the 2018 editions.

Not confirmed on October 4, 2026:

plumbing effective date: the Texas Register adoption notice for the 2021 amendment of 22 TAC 367.2 (June 2021 issue) returned HTTP 403 today, and the Texas SOS Administrative Code viewer (Appian portal) is script-rendered and did not return the source note; the TSBPE compilation does not print the effective date. Left empty.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Texas has no single statewide plumbing code. A plumber must check which code (UPC or IPC) and which local amendments the city or county has adopted; the state rule only fixes the editions (2018) and the fallback for areas with no local code. The 2018 editions replaced the 2012 editions by a 2021 rule amendment. Water closet fill valves must be antisiphon type with the critical level at least 1 inch above the flood level rim (22 TAC 367.2(d)). A move to the 2021 UPC and IPC is in rulemaking (see pending change).

Checked against the official source, October 2026: tsbpe.texas.gov. Administrative Rules March 2026, Texas Administrative Code Title 22, Part 17, Texas State Board of Plumbing Examiners (chapters 361, 363, 365, 367), March 13, 2026

Utah UT

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2024 edition  Effective July 1, 2026  State amendments Yes. Utah Code Title 15A, Chapter 3, Part 3, Statewide Amendments to International Plumbing Code (part of the State Construction Code)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2024 edition  Effective July 1, 2026  State amendments Utah Code Title 15A, Chapter 3, Part 5, Statewide Amendments to International Fuel Gas Code   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions. Utah Code 15A-1-204(1)(a): the State Construction Code is what the state and each political subdivision shall follow. 15A-1-204(8): after December 1, 2016 a political subdivision may not adopt or enforce a requirement more restrictive than the State Construction Code on a subject it addresses, with narrow exceptions. Local amendments exist only as enacted by the Legislature in Title 15A Chapter 4.
Adopting agency: Utah Legislature (adopts the State Construction Code by statute under the State Construction and Fire Codes Act); the Uniform Building Code Commission, staffed by the Division of Professional Licensing, reviews each model code update and recommends adoption
Legal cite: Utah Code 15A-2-103(1)(d) (plumbing) and (1)(f) (fuel gas); Utah Code 15A-1-204; Utah Code 15A-3 Part 3 and Part 5 (statewide amendments)
Pending changes: None for plumbing or fuel gas. A later version of 15A-2-103 effective January 1, 2027 (amended by Chapter 386, 2026 General Session) keeps the 2024 IPC and 2024 IFGC and changes only subsection (2) on the Wildland-Urban Interface Code.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Residential plumbing in one- and two-family dwellings and townhouses falls under the 2021 IRC (15A-2-103(1)(b)), which Utah keeps on a six-year cycle, while the IPC and IFGC are on the 2024 editions. Legislation adopting a code takes effect on the July 1 after enactment unless stated otherwise (15A-1-204(2)(b)). Statewide amendments are statute text in Title 15A Chapter 3; a plumber should read Part 3 (IPC) and Part 5 (IFGC) together with the model code.

Checked against the official source, October 2026: le.utah.gov. Utah Code Section 15A-2-103, Specific editions adopted of construction code of a nationally recognized code authority (Effective 7/1/2026, Superseded 1/1/2027)

Vermont VT

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2024 edition  Effective November 4, 2025  State amendments Yes. Vermont Plumbing Rules, 2025 edition, Section 21, Adoption of the 2024 International Plumbing Code (including VT amendments)   

 Fuel gas code   Basis NFPA 54, National Fuel Gas Code. The Vermont Plumbing Rules delete all references to the IFGC in the 2024 IPC and replace them with the Vermont Fire and Building Safety Code, which adopts NFPA 54, National Fuel Gas Code, 2021 edition including Annex G, and NFPA 58.  Edition 2021 edition (NFPA 54, 2021 edition including Annex G, per the 2025 Vermont Fire and Building Safety Code, effective 11/04/2025)  Effective November 4, 2025  State amendments not stated in the source opened   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions. The Vermont Plumbing Rules apply to all public buildings and to all other buildings or facilities connected to a public water or sewerage system, including owner-occupied single-family residences; owner-occupied single-family residences not connected to public water or sewer do not require a work notice. The 2025 Vermont Fire and Building Safety Code Section 11(3) requires any municipal fire, building or similar code standards to be consistent with the state code.
Adopting agency: Vermont Plumbers' Examining Board, Department of Public Safety, Division of Fire Safety
Legal cite: 26 V.S.A. 2173 (Board rulemaking authority, cited in Section 21 of the rules); Vermont Plumbing Rules (2025) Sections 2, 21 and 23
Pending changes: None stated in the 2025 rules.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Vermont moved from the 2021 IPC (2021 Vermont Plumbing Rules) to the 2024 IPC on 2025-11-04, the same day the 2025 Vermont Fire and Building Safety Code took effect. Section 21 of the rules contains the Vermont deletions and replacements to the IPC (for example building house traps prohibited except where local conditions require). Gas piping and appliances are regulated under the Fire and Building Safety Code (NFPA 54 and 58), not under the IPC or IFGC. The Division of Fire Safety notes that some municipalities have local rules that exceed state codes.

Checked against the official source, October 2026: firesafety.vermont.gov. Vermont Plumbing Rules, The Plumbers' Examining Board, 2025, Effective Date: 11/04/2025

Virginia VA

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2021 edition  Effective January 18, 2024  State amendments Yes. Virginia Uniform Statewide Building Code, 2021 edition, Part I Virginia Construction Code (13VAC5-63), including 13VAC5-63-320 Chapter 29 Plumbing systems, Section 2901.1.1 Changes to the IPC   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2021 edition  Effective January 18, 2024  State amendments Yes. Virginia Construction Code (13VAC5-63), Virginia changes in the mechanical and fuel gas chapters of the 2021 USBC.   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions. Code of Virginia 36-98: the USBC supersedes the building codes and regulations of counties, municipalities and other political subdivisions. Localities enforce the USBC but cannot amend it.
Adopting agency: Virginia Board of Housing and Community Development (administered by the Department of Housing and Community Development, DHCD)
Legal cite: 13VAC5-63-10 (Section 101.2 Incorporation by reference, Note 1); 13VAC5-63-320 (Chapter 29 Plumbing systems); Code of Virginia 36-98
Pending changes: The 2024 code development cycle is underway (DHCD 2024 Code Development Cycle page lists workgroup and study group meetings through 2025 and 2026 and base documents for the VCC and other codes), but no proposed or final 2024 regulation and no effective date are posted.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

The IPC and IFGC are enforced in Virginia through the IBC and IRC chapters incorporated in the Virginia Construction Code, with Virginia changes listed in 13VAC5-63-320 (plumbing) and the mechanical and fuel gas chapters. Water supply sources and sewage disposal systems are approved by the Virginia Department of Health and DEQ, not under the IPC. Code officials are local, but the code is uniform statewide.

Checked against the official source, October 2026: law.lis.virginia.gov. 13VAC5-63-10. Chapter 1 Administration; Section 101 General. (Virginia Administrative Code, Title 13, Agency 5, Chapter 63, Virginia Uniform Statewide Building Code)

Washington WA

 Plumbing code   Basis Uniform Plumbing Code (UPC)  Edition 2021 edition  Effective March 15, 2024  State amendments Yes. Chapter 51-56 WAC, State Building Code Adoption and Amendment of the 2021 Edition of the Uniform Plumbing Code (Washington State Plumbing Code, published as insert pages by the State Building Code Council)   

 Fuel gas code   Basis International Fuel Gas Code (IFGC). Fuel gas piping and appliances are regulated by the IFGC, adopted as part of chapter 51-52 WAC together with the 2021 IMC (WAC 51-52-0101: installation of fuel gas distribution piping and equipment shall be regulated by the International Fuel Gas Code). LP-gas installations follow NFPA 58 (2020 edition) and ANSI Z223.1/NFPA 54 (2021 edition) per WAC 51-52-21101. The UPC provisions on fuel gas piping (chapter 12) are not adopted (RCW 19.27.031(1)(e); WAC 51-56-003).  Edition 2021 edition  Effective March 15, 2024  State amendments Yes. Chapter 51-52 WAC (2021 IMC and IFGC with Washington amendments, for example WAC 51-52-21101 amending IFGC Section 101).   

Scope: Statewide minimum plumbing code. Local governments may adopt stricter amendments but not a different code. RCW 19.27.031 puts the state building code, including the UPC, in effect in all counties and cities. RCW 19.27.040 lets each county or city amend the state building code within its jurisdiction, but the minimum performance standards and objectives of the codes may not be diminished.
Adopting agency: Washington State Building Code Council (SBCC)
Legal cite: WAC 51-56-003 (Uniform Plumbing Code); WAC 51-56-008 (Implementation); RCW 19.27.031(1)(e); RCW 19.27.040
Pending changes: 2024 UPC: SBCC 2024 Code Adoption Cycle page shows CR-101 preproposal 4/1/2025, CR-102 proposed rule 5/5/2026 (public hearings June 2026, testimony updated 08/25/2026), CR-103 adopted rule date TBD; no effective date set. 2024 IMC and IFGC: CR-101 05/21/2024, CR-102 date TBD, CR-103 date TBD.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Washington uses the UPC for plumbing but the IMC and IFGC for fuel gas; UPC chapters 12 (fuel gas piping) and 14 (firestop protection) are not adopted, nor are UPC provisions on building sewers and on venting and combustion air of fuel-fired appliances. Appendices A, B, I and M of the UPC are adopted. Cities and counties may add local amendments that do not lower the minimum standards, so check local amendments (for example Seattle publishes its own amendments). The SBCC mechanical page lists the NFPA editions as 2021 NFPA 58 and 2020 NFPA 54, while WAC 51-52-21101 states 2020 NFPA 58 and 2021 NFPA 54; the WAC text controls.

Checked against the official source, October 2026: app.leg.wa.gov. WAC 51-56-003: Uniform Plumbing Code. (Washington Administrative Code, Chapter 51-56 WAC)

West Virginia WV

 Plumbing code   Basis International Plumbing Code (IPC)  Edition 2018 edition  Effective August 1, 2022  State amendments No. 87 CSR 4 (State Building Code) 4.1.b adopts the 2018 IPC with no listed exceptions. Other codes in the same rule carry exceptions, for example 4.1.d.1 on the 2018 IFGC (underground gas piping minimum depth 12 inches).   

 Fuel gas code   Basis International Fuel Gas Code (IFGC)  Edition 2018 edition  Effective August 1, 2022  State amendments 87 CSR 4, 4.1.d.1: Section 404.10 Underground piping systems shall be installed a minimum depth of 12 inches (305 mm) below grade; if the minimum depth cannot be maintained, the piping shall be installed in conduit or shielded in an approved manner.   

Scope: Mixed arrangement for the plumbing code, see the note. Two layers. (1) The State Building Code (87 CSR 4), which contains the IPC and IFGC, is adopted and enforced by local jurisdictions that choose to adopt it (87-4-7, Adoption by Local Jurisdiction; local jurisdictions must adopt it as written and may complete only the discretionary provisions and appendices). (2) The Division of Labor rule for licensed plumbers, 42 CSR 32 section 4, incorporates the IPC as adopted in 87 CSR 4 for all plumbing work under the Supervision of Plumbing Work Act, so the IPC is the work standard for licensed plumbers statewide even where no local jurisdiction enforces a building code.
Adopting agency: West Virginia State Fire Commission (rule filed by the State Fire Marshal's office); the Division of Labor adopts the same IPC for licensed plumbing work
Legal cite: 87 CSR 4, section 87-4-4.1.b (IPC) and 4.1.d (IFGC), authority W. Va. Code 15A-11-5; 42 CSR 32, section 42-32-4 (Division of Labor, Supervision of Plumbing Work), authority W. Va. Code 21-14-4
Pending changes: Proposed amendment of 87 CSR 4 to the 2024 editions (2024 IBC, 2024 IPC, 2024 IMC, 2024 IFGC, 2024 IRC, 2024 IECC, 2023 NEC and others): Notice filed 6/29/2026, Agency Approved version filed with the Legislative Rule-Making Review Committee 7/31/2026, comments received 8/18/2026; status In Progress on the Secretary of State rule register. As a legislative rule it needs legislative authorization before it can take effect; no effective date yet.

Not confirmed on October 4, 2026:

legal cite statute text: W. Va. Code 15A-11-5 could not be opened today (code.wvlegislature.gov and wvlegislature.gov returned a bot-check page). The citation is taken from the authority line of 87 CSR 4 and the SOS rule register, both opened.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

West Virginia is still on the 2018 I-codes; the 2024 update is in the 2026 rulemaking pipeline and would need the 2027 Legislature to authorize it. Building code enforcement (permits and inspections) exists only in counties and municipalities that have adopted the State Building Code; local jurisdictions may not adopt a different building code (87-4-8: all building codes previously adopted by local jurisdictions are null and void). Where the IPC conflicts with Department of Health rules, the health rules take precedence (87-4-3.2). Licensed plumbers must follow the IPC everywhere in the state under 42 CSR 32.

Checked against the official source, October 2026: firemarshal.wv.gov. 87CSR4, Title 87 Legislative Rule, State Fire Commission, Series 4, State Building Code (Filing Date May 5, 2022; Effective Date August 1, 2022)

Wisconsin WI

 Plumbing code   Basis Code written by the state. Wisconsin Plumbing Code, Wis. Admin. Code chapters SPS 381 to 387 (SPS 381 Definitions and standards; SPS 382 Design, construction, installation, supervision, maintenance and inspection of plumbing; SPS 383 POWTS; SPS 384 Plumbing products; SPS 385 Soil and site evaluations; SPS 386 Boat and on-shore sewage facilities; SPS 387 POWTS financial assistance). Wisconsin does not adopt the IPC or the UPC.  Edition Wisconsin Plumbing Code, chs. SPS 381 to 387 (continuously amended; no model-code edition)  Effective not confirmed  State amendments No. Not applicable: the code is state-written, not a model code with amendments.   

 Fuel gas code   Basis not confirmed  Edition not confirmed   

Scope: Statewide and uniform plumbing code. Local governments enforce the state code and may not change its technical provisions. SPS 382.01: the provisions apply uniformly to the design, construction, installation, supervision, maintenance and inspection of plumbing. SPS 382.03(2), pursuant to s. 145.13, Stats.: the chapter is uniform in application and a municipality may not enact an ordinance for plumbing that is more stringent than the chapter, except as specifically permitted by rule.
Adopting agency: Wisconsin Department of Safety and Professional Services (DSPS), Division of Industry Services (Plumbing program), with the Plumbing Code Advisory Committee
Legal cite: Wis. Stat. 145.02 and 145.13; Wis. Admin. Code chs. SPS 381 to 387 (SPS 382.01, 382.015, 382.03)
Pending changes: CR 26-019, SPS 381 to 387, Plumbing Code Review, is listed on the DSPS Pending Rules page (links to docs.legis.wisconsin.gov, unreachable on October 4, 2026); no effective date available.

Not confirmed on October 4, 2026:

plumbing effective date: live SPS 381 to 387 on docs.legis.wisconsin.gov unreachable today (connection timeout); the archived 2023 DSPS copy shows SPS 382 last published Register December 2013 No. 696 and SPS 381 Register June 2018 No. 750, which may not be current. Left empty.
fuel gas code basis and fuel gas edition: SPS 365 (Fuel gas appliances) and SPS 340 (Gas systems) could not be opened today (docs.legis.wisconsin.gov unreachable); the NFPA standard and edition adopted are not recorded. Left empty.
pending change details: the CR 26-019 clearinghouse rule page is on docs.legis.wisconsin.gov and could not be opened; only its listing on the DSPS Pending Rules page was verified.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Wisconsin has its own plumbing code written by the state; plumbers do not use the IPC or UPC. Plan review for larger projects goes to DSPS or to a municipality that DSPS has delegated (DSPS Plumbing Delegated Agent list). The live code text lives on docs.legis.wisconsin.gov, which refused connections all day; the DSPS archived 2023 copy was used, so register dates in the live version may be newer. A full plumbing code review (CR 26-019) is pending.

Checked against the official source, October 2026: dsps.wi.gov. 2023 SPS 381-384 (archived DSPS copy of Wis. Admin. Code chapters SPS 381 to 384, published under s. 35.93, Wis. Stats., by the Legislative Reference Bureau; SPS 381 shows Register June 2018 No. 750, SPS 382 shows Register December 2013 No. 696)

Wyoming WY

 Plumbing code   Basis No statewide code; cities and counties adopt their own   

 Fuel gas code   Basis International Fuel Gas Code (IFGC). 2024 IFGC incorporated by reference by the Council. LP-gas installations: current edition of NFPA 58 and ANSI Z223.1/NFPA 54, which control over the IFGC where they conflict (W.S. 35-9-106(d)). fuel gas effective date June 28, 2024 is the adoption date stated by the State Fire Marshal's office (council adoption date 04/23/2024 on the ARR24-027 certification page); no separate effective date is stated in the sources opened.  Edition 2024 edition  Effective June 28, 2024  State amendments No. Council rule incorporates the 2024 IFGC by reference without amendments; NFPA 58 and ANSI Z223.1/NFPA 54 (current edition) control for LP-gas installations (W.S. 35-9-106(d)).   

Scope: No statewide plumbing code. Each city or county adopts its own. No state agency adopts a plumbing code. The Council on Fire Prevention and Electrical Safety in Buildings incorporates the 2024 IBC, IEBC, IFC, IMC and IFGC, and incorporates IPC provisions only as they are referenced in chapters 1 to 10 of those codes; the 2018 version of the same rule said the referenced IPC provisions were specifically not adopted. W.S. 35-9-106(a)(i) limits the council's minimum standards to the IFC, IBC, IMC, IEBC and IFGC. Plumbing codes, where they exist, are adopted by cities, towns and counties under their own ordinances; W.S. 35-9-121 delegates fire, building and electrical enforcement to municipalities and counties that adopt standards at least equal to the state's.
Adopting agency: None for plumbing. Fuel gas: Wyoming Council on Fire Prevention and Electrical Safety in Buildings, Department of Fire Prevention and Electrical Safety (State Fire Marshal)
Legal cite: W.S. 35-9-106(a)(i) and (d); W.S. 35-9-121; Rules of the Council on Fire Prevention and Electrical Safety, Chapter 1 General Provisions, Section 2 Codes and Standards
Pending changes: None found. The 2024 codes were adopted by the council on 04/23/2024 (certification page) and the State Fire Marshal's office states the State adopted the 2024 International Codes on June 28, 2024.

Not confirmed on October 4, 2026:

Which model plumbing code individual Wyoming cities and counties use was not checked today; no local ordinance was opened.

Notes from the research

Recorded on October 3, 2026 and checked on October 4, 2026. "Today" in the notes means those dates.

Wyoming has no statewide plumbing code and no state plumbing license; plumbing requirements depend entirely on the city, town or county (many adopt the IPC or UPC by local ordinance; verify with the local building department). Fuel gas at the state level is the 2024 IFGC with NFPA 54 and 58 controlling for LP-gas; local jurisdictions with delegated enforcement may have more stringent provisions, which prevail (W.S. 35-9-121(b)). The Council rules are posted as a PDF on the State Fire Marshal site (Google Drive link) and on rules.wyo.gov.

Checked against the official source, October 2026: wyoleg.gov. Wyoming Legislature administrative rules filing ARR24-027: Certification Page, Regular and Emergency Rules, Fire Prevention & Electrical Safety, Dept, Council on Fire Prevention, Electrical Safety, Chapter 1 General Provisions (Amended), Adoption Date 04/23/2024, with Statement of Reasons and clean and strike-through text of Chapter 1

Verification on October 4, 2026 corrected or newly sourced: source url, source title from wyoleg.gov; additional sources from wsfm.wyo.gov.

About the data

US statewide plumbing and fuel gas code adoption (50 states and the District of Columbia). Researched on October 3, 2026; every cited source reopened on October 4, 2026. Each filled cell is traceable to a state agency, administrative code, statute or official bulletin opened on those dates; publisher adoption maps were not used as a source. A cell the research could not trace is shown as not confirmed, with the reason, and a jurisdiction whose official pages could not be loaded is shown without values. PlumbMath does not know which local amendments apply where you work.

Printed from PlumbMath. Code adoption sources last checked on October 4, 2026.