Data / Federal rules / 2024-29229

Redesignation of Portions of Westmoreland and Cambria Counties, Pennsylvania for the 2010 Sulfur Dioxide (SO2) National Ambient Air Quality Standards (NAAQS)

The Environmental Protection Agency published this final rule in the Federal Register on December 17, 2024. It took effect on January 16, 2025.

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What the agency says

The Environmental Protection Agency (the EPA or the Agency) is finalizing the redesignation of portions of Cambria County and Westmoreland County, Pennsylvania, to "nonattainment" for the 2010 1- hour primary sulfur dioxide (SO<INF>2</INF>) national ambient air quality standard (NAAQS or standard). Westmoreland County was previously designated "attainment/ unclassifiable," and Cambria County was designated "unclassifiable." The EPA notified the Commonwealth of Pennsylvania of its intended redesignation of portions of Cambria and Westmoreland counties on February 17, 2023, and published a Notice of Availability (NOA) for this action on February 12, 2024. The EPA's redesignation of portions of these counties is based on modeled violations of the 2010 1-hour primary SO<INF>2</INF> NAAQS.

Key facts

Document number: 2024-29229
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: December 17, 2024
Takes effect: January 16, 2025
Dates: This final rule is effective on January 16, 2025.
Docket: EPA-R03-OAR-2023-0419; FRL-11736-02-R3
Code of Federal Regulations: 40 CFR 81
Topics: Air pollution control; Carbon monoxide; Environmental protection; Intergovernmental relations; 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 December 2024

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.