Final rule · 2026-00004

Air Plan Approval; Michigan; Infrastructure SIP Requirements for the 2015 Ozone NAAQS; Michigan State Board Requirements; Withdrawal of Direct Final Rule

Due to the receipt of an adverse comment, the Environmental Protection Agency (EPA) is withdrawing the November 20, 2025, direct final rule approving an element of a State Implementation Plan (SIP) submission from Michigan regarding the infrastructure requirements of section 110 of the Clean Air Act (CAA) for the 2015 ozone National Ambient Air Quality Standards (NAAQS).