Data / Federal rules / 2025-22584

Air Plan Approval; California; South Coast Air Quality Management District

The Environmental Protection Agency published this final rule in the Federal Register on December 11, 2025. It took effect on January 12, 2026.

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What the agency says

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the South Coast Air Quality Management District (SCAQMD) portion of the California State Implementation Plan (SIP) concerning a rule submitted to address section 185 of the Clean Air Act (CAA or "Act") with respect to the 1997 and 2008 8-hour ozone National Ambient Air Quality Standards (NAAQS or "standard").

Key facts

Document number: 2025-22584
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: December 11, 2025
Takes effect: January 12, 2026
Dates: This rule is effective January 12, 2026.
Docket: EPA-R09-OAR-2025-0199; FRL-12749-02-R9
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Nitrogen oxides; Ozone; Reporting and recordkeeping requirements; Volatile organic compounds
Pages: 2

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 December 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.