Data / Federal rules / 2025-18611

Air Plan Approval; West Virginia; 2024 Amendments to West Virginia's Ambient Air Quality Standards

The Environmental Protection Agency published this final rule in the Federal Register on September 25, 2025. It took effect on October 27, 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. This revision updates West Virginia's incorporation by reference (IBR) of EPA's national ambient air quality standards (NAAQS) and the associated monitoring reference and equivalent methods. EPA is approving these revisions to the West Virginia SIP in accordance with the requirements of the Clean Air Act (CAA).

Key facts

Document number: 2025-18611
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: September 25, 2025
Takes effect: October 27, 2025
Dates: This final rule is effective on October 27, 2025.
Docket: EPA-R03-OAR-2024-0581; FRL-12329-02-R3
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Carbon monoxide; Environmental protection; Incorporation by reference; Intergovernmental relations; Lead; Nitrogen dioxide; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
Pages: 3

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on carbon monoxide · Rules on environmental protection · Published in September 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.