Partial Approval and Partial Disapproval of Attainment Plan for the Idaho Portion of the Logan, Utah/Idaho PM2.5

The Environmental Protection Agency (EPA) is taking final action on portions of a state implementation plan (SIP) submission from the State of Idaho. The SIP submission addresses attainment plan requirements for the Idaho portion of the Logan, Utah-Idaho nonattainment area (Logan UT-ID) for the 2006 24-hour PM2.5 National Ambient Air Quality Standards (NAAQS). The Idaho Department of Environmental Quality (IDEQ) submitted the attainment plan to the EPA on December 14, 2012 (2012 SIP submission), and supplemented the attainment plan on December 24, 2014 (2014 amendment). The EPA is approving certain portions, disapproving other portions, and deferring action on the remaining portions of the attainment plan.