# Determination of Attainment by the Attainment Date; Michigan; St. Clair 2010 Sulfur Dioxide Nonattainment Area
> **Rule** · Final rule. · Published 2024-12-26 · Effective 2025-01-27 · 89 FR 104884
## Document
- **Document number:** 2024-30583
- **Category:** air-emissions
- **Federal Register citation:** 89 FR 104884
- **CFR reference:** 40 CFR 52
- **Publication date:** 2024-12-26
- **Effective date:** 2025-01-27
- **State:** MI
- **EPA docket:** EPA-R05-OAR-2020-0385
## Abstract

The Environmental Protection Agency (EPA) is making a final determination that the St. Clair, MI sulfur dioxide (SO<INF>2</INF>) nonattainment area attained the 2010 SO<INF>2</INF> national ambient air quality standard (NAAQS) by the date of September 12, 2021, addressing EPA's obligation under the Clean Air Act (CAA) to determine whether the area attained the 2010 SO<INF>2</INF> NAAQS attainment date. EPA proposed this action on September 26, 2024, and received no comments.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/12/26/2024-30583/determination-of-attainment-by-the-attainment-date-michigan-st-clair-2010-sulfur-dioxide)
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