The Environmental Protection Agency (EPA) is redesignating the West Silver Valley, Idaho nonattainment area to attainment for the 2012 annual fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS). EPA is also approving a maintenance plan for the area that demonstrates continued attainment of the 2012 PM<INF>2.5</INF> NAAQS through the year 2031, which Idaho submitted along with the redesignation request for inclusion into the Idaho State Implementation Plan (SIP). Additionally, EPA is approving the 2031 motor vehicle emissions budgets included in Idaho's maintenance plan for PM<INF>2.5</INF>, nitrogen oxides and volatile organic compounds. EPA is taking this action pursuant to the Clean Air Act (CAA or the Act).