The Environmental Protection Agency (EPA) is approving the following portions of Ohio's State Implementation Plan (SIP) submission for the Cleveland 2015 ozone national ambient air quality standard (NAAQS or standard) Moderate nonattainment area: the base year emissions inventory, the reasonable further progress (RFP) demonstration, the motor vehicle inspection and maintenance (I/M) program, and the nonattainment new source review (NNSR) program. EPA is approving these portions of the state's submission as a SIP revision pursuant to section 110 and part D of the Clean Air Act (CAA) and EPA's regulations. EPA is also finding adequate and approving the 2023 motor vehicle emissions budgets (budgets) associated with the Cleveland Moderate ozone nonattainment RFP demonstration. EPA proposed to approve this action on January 3, 2025, and received no comments.