Data / Federal rules / 2025-21322

Air Plan Approval; Ohio; Emergency Episodes and Ambient Air Quality Standards

The Environmental Protection Agency published this final rule in the Federal Register on November 26, 2025. It took effect on January 26, 2026. Comments closed on December 26, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is approving amendments to Ohio Administrative Code (OAC) Chapter 3745-25, Emergency Episodes and Ambient Air Quality Standards, into Ohio's State Implementation Plan (SIP). The amendments to the rule include minor style changes, correct typographical errors, and update publication and referenced material titles, effective dates, and addresses.

Key facts

Document number: 2025-21322
Type: Final rule
Action: Direct final rule
Agency: Environmental Protection Agency
Published: November 26, 2025
Takes effect: January 26, 2026
Comments due: December 26, 2025
Dates: This direct final rule will be effective January 26, 2026, unless EPA receives adverse comments by December 26, 2025. If adverse comments are received, EPA will publish a timely withdrawal of the direct final rule in the Federal Register informing the public that the rule will not take effect.
Docket: EPA-R05-OAR-2025-0013; FRL-13051-02-R5
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Carbon oxides; Environmental protection; Incorporation by reference; Intergovernmental relations; Lead; Nitrogen oxides; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
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 carbon oxides · Rules on environmental protection · Published in November 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.