Data / Federal rules / 2025-22607

Air Plan Approval; Michigan; Moderate Attainment Plan Elements for the Allegan County, Berrien County, and Muskegon County Areas for the 2015 Ozone Standard

The Environmental Protection Agency published this proposed rule in the Federal Register on December 11, 2025. Comments closed on January 12, 2026.

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What the agency says

The Environmental Protection Agency (EPA) is proposing to approve revisions to the Michigan State Implementation Plan (SIP) as meeting the reasonable further progress (RFP) requirements of the Clean Air Act (CAA) for the Allegan County (partial county), Berrien County, and Muskegon County (partial county) Moderate nonattainment areas for the 2015 ozone national ambient air quality standard (NAAQS). EPA is also proposing to approve updated 2017 base year emissions inventories and is initiating the adequacy process and proposing approval of the 2023 motor vehicle emissions budgets (budgets) associated with the Allegan County, Berrien County, and Muskegon County Moderate ozone nonattainment RFP demonstrations. EPA is proposing to approve these portions of the State's SIP submission pursuant to section 110 and part D of the CAA, and EPA's regulations.

Key facts

Document number: 2025-22607
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: December 11, 2025
Comments due: January 12, 2026
Dates: Comments must be received on or before January 12, 2026.
Docket: EPA-R05-OAR-2023-0515; EPA-R05-OAR-2023-0516; EPA-R05-OAR-2023-0517; FRL-12810-01-R5
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Nitrogen oxides; Ozone; Volatile organic compounds
Pages: 7

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on environmental protection · Rules on incorporation by reference · Published in December 2025

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