# Air Plan Approval; Michigan; Redesignation of the Berrien, MI and Muskegon, MI Areas to Attainment of the 2015 Ozone Standards

**Action Urgency Score:** 20/100

| Field | Value |
|---|---|
| Agency | Environmental Protection Agency |
| Type | Proposed rule |
| Action | Proposed rule. |
| Published | 2026-07-28 |
| Comments close | 2026-08-27 |
| Significant | No |
| CFR parts | 40 CFR 52, 40 CFR 81 |
| Summary | The Environmental Protection Agency (EPA) is proposing to approve the Michigan Department of Environment, Great Lakes, and Energy's (EGLE's) December 26, 2025, requests to redesignate the Berrien and Muskegon areas to attainment for the 2015 ozone NAAQS because the requests meet the statutory requirements for redesignation under the Clean Air Act (CAA). The Berrien area includes Berrien County, and the Muskegon area includes the western portion of Muskegon County. The EPA is proposing to approve, as revisions to the Michigan State Implementation Plan (SIP), the State's plans for maintaining th |
| Document number | 2026-15167 |

## Why this score


Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/07/28/2026-15167/air-plan-approval-michigan-redesignation-of-the-berrien-mi-and-muskegon-mi-areas-to-attainment-of). Last refreshed: 2026-11-04T09:17:43.641Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.