Data / Federal rules / 2025-22582

Approval of Air Quality Implementation Plans; Arizona; Arizona Department of Environmental Quality; Stationary Source Permits; West Pinal County; PM10

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 fully approve the Arizona Department of Environmental Quality's (ADEQ or "State") portion of the Arizona State Implementation Plan (SIP) under the Clean Air Act (CAA or "the Act") that addresses Nonattainment New Source Review (NNSR) permitting for precursor emissions from major stationary sources for purposes of the 1987 PM<INF>10</INF> National Ambient Air Quality Standards (NAAQS or standard) in the West Pinal PM<INF>10</INF> nonattainment area.

Key facts

Document number: 2025-22582
Type: Final rule
Action: Final action
Agency: Environmental Protection Agency
Published: December 11, 2025
Takes effect: January 12, 2026
Dates: This action is effective January 12, 2026.
Docket: EPA-R09-OAR-2025-1113; FRL-12927-02-R9
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Particulate matter; Reporting and recordkeeping requirements
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 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.