Data / Federal rules / 2026-07399

Air Plan Approval; Pennsylvania; Redesignation Request for the Allegheny County Area for the 2012 Annual Fine Particulate Matter Standard

The Environmental Protection Agency published this final rule in the Federal Register on April 16, 2026. It took effect on May 18, 2026.

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What the agency says

The Environmental Protection Agency (EPA) is approving the Commonwealth of Pennsylvania's request to redesignate the Allegheny County, Pennsylvania nonattainment area (Allegheny County Area) to attainment for the 2012 annual fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS or standard). The redesignation request was submitted by the Commonwealth of Pennsylvania Department of Environmental Protection (PADEP or Pennsylvania) on behalf of the Allegheny County Health Department (ACHD). This action is being taken under the CAA.

Key facts

Document number: 2026-07399
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: April 16, 2026
Takes effect: May 18, 2026
Dates: This final rule is effective on May 18, 2026.
Docket: EPA-R03-OAR-2025-1777; FRL-12985-02-R3
Code of Federal Regulations: 40 CFR 81
Topics: Air pollution control; Carbon monoxide; Environmental protection; Intergovernmental relations; Lead; Nitrogen dioxide; Ozone; 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 carbon monoxide · Rules on environmental protection · Published in April 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.