Air Plan Approval; Wisconsin; Milwaukee Second 10-Year 2006 24-Hour PM2.5 Limited Maintenance Plan

The Environmental Protection Agency (EPA) is approving the limited maintenance plan (LMP) submitted by the Wisconsin Department of Natural Resources (WDNR) for the Milwaukee-Racine maintenance area including Milwaukee, Waukesha, and Racine counties. The plan addresses the second 10-year maintenance period for particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers (PM<INF>2.5</INF>). EPA is approving Wisconsin's LMP submission for the Milwaukee-Racine maintenance area because it provides for the maintenance of the 2006 PM<INF>2.5</INF> National Ambient Air Quality Standards (NAAQS) through the end of the second 10-year portion of the maintenance period. Additionally, EPA finds adequate and is approving the LMP as meeting the appropriate transportation conformity requirements. EPA proposed to approve this action on March 19, 2024, and received no comments.