Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements

What it does

The Environmental Protection Agency (EPA) is approving an element of a State Implementation Plan (SIP) submission from the Michigan Department of Environment, Great Lakes, and Energy (Michigan) regarding the infrastructure requirements of section 110 of the Clean Air Act (CAA) for the 2015 ozone National Ambient Air Quality Standards (NAAQS). The infrastructure requirements ensure that the structural components of each State's air quality management program are adequate to meet CAA requirements. This action pertains to CAA section 110(a)(2)(E)(ii). The EPA received comments on its November 20, 2025, proposed rule and withdrew the accompanying direct final rule. After considering the comments, the EPA is approving this element of Michigan's March 8, 2019, SIP submission.

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

What changed in the regulation

1 part of Title 40 of the Code of Federal Regulations:

40 CFR 52

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The Environmental Protection Agency has published 245 final rules in 2026 so far, compared with 263 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

What happens next and when

This final rule is effective on June 15, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket EPA-R05-OAR-2019-0215 on Regulations.gov
• Title 40 on eCFR

The record as published

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