Data / Federal rules / 2025-19238

Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Revisions to Regulation for Control of Ozone Season Nitrogen Oxide Emissions

The Environmental Protection Agency published this final rule in the Federal Register on October 2, 2025. It took effect on November 3, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is approving a state implementation plan (SIP) revision submitted by the State of West Virginia. The revision pertains to West Virginia 45 Code of State Rules (CSR) 40 (WV rule) that establishes the nitrogen oxides (NO<INF>X</INF>) ozone season limitations and requirements for non- electrical generating unit (EGU) large industrial boilers and combustion turbines that have a maximum design heat input of greater than 250 million British thermal units per hour (MMBtu/hr), as well as affected stationary internal combustion engines and cement manufacturing kilns. This action is being taken under the Clean Air Act (CAA).

Key facts

Document number: 2025-19238
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: October 2, 2025
Takes effect: November 3, 2025
Dates: This final rule is effective on November 3, 2025.
Docket: EPA-R03-OAR-2024-0513; FRL-12075-02-R3
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Nitrogen dioxide; Ozone; Particulate matter; Sulfur oxides
Pages: 4

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on environmental protection · Rules on incorporation by reference · Published in October 2025

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.