Data / Federal rules / 2025-13957

Air Plan Approval; Washington; Regional Haze State Implementation Plan for the Second Implementation Period

The Environmental Protection Agency published this proposed rule in the Federal Register on July 24, 2025. Comments closed on August 25, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is proposing to approve the regional haze State Implementation Plan (SIP) revision submitted by Washington on January 28, 2022, to address applicable requirements under the Clean Air Act (CAA) and the EPA's Regional Haze Rule (RHR) for the regional haze program's second implementation period. The EPA is proposing this action pursuant to the CAA.

Key facts

Document number: 2025-13957
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: July 24, 2025
Comments due: August 25, 2025
Dates: Written comments must be received on or before August 25, 2025.
Docket: EPA-R10-OAR-2024-0541; FRL-12449-01-R10
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
Pages: 21

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 July 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.