Data / Federal rules / 2026-10768

Designation of Areas for Air Quality Planning Purposes; Michigan; Technical Amendment

The Environmental Protection Agency published this final rule in the Federal Register on May 29, 2026. It took effect on June 29, 2026.

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What the agency says

The Detroit, Michigan area was redesignated to attainment of the 2015 ozone National Ambient Air Quality Standards (NAAQS) on May 19, 2023. On December 5, 2025, the United States Court of Appeals for the Sixth Circuit vacated the Environmental Protection Agency's (EPA's) redesignation of the Detroit area. Therefore, pursuant to the Court's decision, the EPA is making a technical amendment to the part 81 listing for the Detroit area to reflect the area's designation as nonattainment for the 2015 ozone NAAQS, with a classification of Moderate.

Key facts

Document number: 2026-10768
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: May 29, 2026
Takes effect: June 29, 2026
Dates: This final rule is effective on June 29, 2026.
Docket: EPA-R05-OAR-2022-0004; FRL-13336-01-R5
Code of Federal Regulations: 40 CFR 81
Topics: Air pollution control; Environmental protection; Wilderness areas
Pages: 2

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 wilderness areas · Published in May 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.