Air Plan Approval; Michigan; Determination of Attainment by the Attainment Date for the 2015 Ozone Standards

Document 2026-10767 is a Proposed Rule published by the Environmental Protection Agency in the Federal Register on May 29, 2026. The Environmental Protection Agency (EPA) is proposing to determine under the Clean Air Act (CAA) that the Detroit, Michigan nonattainment area ("Detroit area" or "area") attained the 2015 ozone National Ambient Air Quality Standards (NAAQS) by the applicable attainment date. This determination relies on the EPA's concurrence on an exceptional events request submitted by the Michigan Department of Environment, Great Lakes, and Energy (EGLE) on February 19, 2026, and concurred on by the EPA on March 24, 2026. Therefore, the EPA is proposing to take final agency action on Michigan's exceptional events request. This action, if finalized, will fulfill the EPA's statutory obligation to determine whether the Detroit area attained the 2015 ozone NAAQS by the Moderate attainment date of August 3, 2024. View the original at https://www.federalregister.gov/documents/2026/05/29/2026-10767/air-plan-approval-michigan-determination-of-attainment-by-the-attainment-date-for-the-2015-ozone.

No. Document 2026-10767 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.