Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements
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.
What this item does
The short version, using the agency's own summary text.
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.
Final rule.
Important dates
The dates that matter most for this item.
Published
May 14, 2026
Starts
June 15, 2026
Who published it
Federal rulebook sections mentioned
These are the parts of the Code of Federal Regulations cited in the filing.