Data / Federal rules / 2025-13339

Determination of Attainment by the Attainment Date and Clean Data Determination; California, San Joaquin Valley 1997 Annual PM2.5 Fine Particulate Matter Nonattainment Area

The Environmental Protection Agency published this proposed rule in the Federal Register on July 16, 2025. Comments closed on August 15, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is proposing to determine that the San Joaquin Valley, California fine particulate matter (PM<INF>2.5</INF>) nonattainment area attained the 1997 annual PM<INF>2.5</INF> national ambient air quality standards (NAAQS) by the December 31, 2024 applicable attainment date. This proposed determination is based on ambient air quality monitoring data from 2022 through 2024. We are also proposing to make a clean data determination (CDD) based on the 2022 through 2024 data and our evaluation of preliminary air quality monitoring data from 2025. We are taking comments on this proposal and plan to follow with a final action.

Key facts

Document number: 2025-13339
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: July 16, 2025
Comments due: August 15, 2025
Dates: Comments must be received on or before August 15, 2025.
Docket: EPA-R09-OAR-2025-0292; FRL-12825-01-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: 6

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 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.