# Air Plan Approval; Pennsylvania; Redesignation Request and Associated Maintenance Plan for the Liberty-Clairton Area for the 1997 Annual and 2006 24-Hour Fine Particulate Matter Standard and Maintenance Plan for the Allegheny County Area for the 2012 Annual Fine Particulate Matter Standard
> **Rule** · — · Published 2025-08-08 · 90 FR 38406
## Document
- **Document number:** C1-2025-13893
- **Category:** air-emissions
- **Federal Register citation:** 90 FR 38406
- **CFR reference:** 40 CFR 52
- **Publication date:** 2025-08-08
- **State:** PA
- **EPA docket:** EPA-R03-OAR-2024-0586
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/08/08/C1-2025-13893/air-plan-approval-pennsylvania-redesignation-request-and-associated-maintenance-plan-for-the)
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*MORVS · CC0 1.0*