The Environmental Protection Agency (EPA) is finalizing a determination that the West Silver Valley, Idaho nonattainment area has clean data for the 2012 annual fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS). This clean data determination (CDD) is based upon quality-assured, quality- controlled, and certified ambient air monitoring data showing the area has attained the 2012 PM<INF>2.5</INF> NAAQS based on the 2015-2017 data available in the EPA's Air Quality System (AQS) database. The EPA also is taking final agency action on the September 2017 wildfire exceptional event at the Pinehurst monitoring station as having affected PM<INF>2.5</INF> and PM<INF>10</INF> values. Based on this clean data determination, the EPA determines that the obligation for Idaho to make submissions to meet certain Clean Air Act (CAA or the Act) requirements related to attainment of the NAAQS for this area is suspended for as long as the area continues to attain the 2012 annual PM<INF>2.5</INF> NAAQS. Additionally, the sanctions and Federal Implementation Plan (FIP) clocks triggered by the March 26, 2018 Finding of Failure to Submit action will be suspended. No adverse comments were received on this action.