# St. Clair County Michigan 2010 SO2 Redesignation and Maintenance Plan

> **EPA** · Rulemaking · Modified 2026-04-11T04:01:20Z

## Docket
- **Docket ID:** EPA-R05-OAR-2023-0635
- **Agency:** EPA
- **Type:** Rulemaking
- **Last modified:** 2026-04-11T04:01:20Z

## Source
- [regulations.gov docket](https://www.regulations.gov/docket/EPA-R05-OAR-2023-0635)
- [Public comments](https://www.regulations.gov/docket/EPA-R05-OAR-2023-0635/comments)

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