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

> **EPA** · Rulemaking · Modified 2026-04-16T13:36:02Z

## Docket
- **Docket ID:** EPA-R03-OAR-2025-1777
- **Agency:** EPA
- **Type:** Rulemaking
- **Last modified:** 2026-04-16T13:36:02Z

## Source
- [regulations.gov docket](https://www.regulations.gov/docket/EPA-R03-OAR-2025-1777)
- [Public comments](https://www.regulations.gov/docket/EPA-R03-OAR-2025-1777/comments)

---

*AI Analytics · CC0 1.0*