Data / Federal rules / 2026-03880

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 final rule in the Federal Register on February 26, 2026. It took effect on March 30, 2026.

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What the agency says

The Environmental Protection Agency (EPA) is approving a revision 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). The EPA is also approving updated 2017 base year emissions inventories and is finding adequate and approving the 2023 motor vehicle emissions budgets (budgets) associated with the Allegan County, Berrien County, and Muskegon County Moderate ozone nonattainment RFP demonstrations. The EPA is approving these portions of the State's SIP submission pursuant to section 110 and part D of the CAA, and EPA's regulations. The EPA proposed to approve this action on December 11, 2025, and received no adverse comments.

Key facts

Document number: 2026-03880
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: February 26, 2026
Takes effect: March 30, 2026
Dates: This final rule is effective on March 30, 2026.
Docket: EPA-R05-OAR-2023-0515; EPA-R05-OAR-2023-0516; EPA-R05-OAR-2023-0517; FRL-12810-02-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: 3

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 February 2026

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.