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Proposed rule

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

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register July 28, 2026. Document 2026-15167. Updated Nov. 7, 2026.

What it does

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 the 2015 ozone NAAQS through 2036 in the Berrien and Muskegon areas. The EPA is initiating the adequacy process and proposing to approve Michigan's 2032 and 2036 volatile organic compound (VOC) and oxides of nitrogen (NO<INF>X</INF>) motor vehicle emissions budgets (budgets) for the Berrien and Muskegon areas. Pursuant to section 110 and part D of the CAA, the EPA is proposing to approve the enhanced monitoring plan (EMP) of ozone and ozone precursors SIP revision submitted by Michigan on January 12, 2026, because it satisfies Serious SIP requirements of the CAA for the Berrien and Muskegon areas. The EPA is also proposing to approve the Serious VOC reasonably available control technology (RACT) SIP revision and CAA section 182(f) waiver from Serious NO<INF>X</INF> RACT requirements for the Berrien and Muskegon areas under the 2015 ozone NAAQS submitted by EGLE to the EPA on May 5, 2026.

The Environmental Protection Agency's summary, as published in the Federal Register.

What it would change

2 parts of Title 40 of the Code of Federal Regulations:

40 CFR 52, 40 CFR 81

What happens next and when

Comments must be received on or before August 27, 2026.

The agency's dates, word for word.

Document number2026-15167
ActionProposed rule.
AgenciesEnvironmental Protection Agency
PublishedJuly 28, 2026
Comments closeAug. 27, 2026
DocketEPA-R05-OAR-2025-4116

Source: the Federal Register (public domain). The document in the Federal Register