# Air Quality Designations for the 2024 Revised Primary Annual Particulate Matter (PM2.5) National Ambient Air Quality Standards (NAAQS)

> **EPA** · Rulemaking · Modified 2026-04-27T17:38:30Z

## Docket
- **Docket ID:** EPA-HQ-OAR-2024-0078
- **Agency:** EPA
- **Type:** Rulemaking
- **Last modified:** 2026-04-27T17:38:30Z

## Source
- [regulations.gov docket](https://www.regulations.gov/docket/EPA-HQ-OAR-2024-0078)
- [Public comments](https://www.regulations.gov/docket/EPA-HQ-OAR-2024-0078/comments)

---

*MORVS · CC0 1.0*