The Environmental Protection Agency (EPA) is approving most elements of a State Implementation Plan (SIP) submission from Minnesota 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 are designed to ensure that the structural components of each state's air quality management program are adequate to meet the state's responsibilities under the CAA. EPA proposed this action on May 24, 2022 and received no comments.