Data / Federal rules / 2026-20097

Attainment Date Extension for the South Coast, California 2012 Annual PM2.5 Fine Particulate Matter Nonattainment Area

The Environmental Protection Agency published this final rule in the Federal Register on October 1, 2026. It takes effect on November 2, 2026.

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What the agency says

The U.S. Environmental Protection Agency (EPA or "Agency") is granting an extension of the "Serious" area attainment date for the Los Angeles-South Coast Air Basin ("South Coast Air Basin" or "South Coast") nonattainment area for the 2012 annual fine particulate matter less than or equal to 2.5 [micro]m in diameter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS) from December 31, 2025, to December 31, 2030, based on a determination that the State has satisfied the statutory criteria for this extension.

Key facts

Document number: 2026-20097
Type: Final rule
Action: Final action
Agency: Environmental Protection Agency
Published: October 1, 2026
Takes effect: November 2, 2026
Dates: This action is effective November 2, 2026.
Docket: EPA-R09-OAR-2026-3664; FRL-13379-02-R9
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Ammonia; Environmental protection; Incorporation by reference; Intergovernmental relations; Nitrogen oxides; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
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 ammonia · Rules on environmental protection · Published in October 2026

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.