Attainment Date Extensions for the Logan, Utah-Idaho 24-Hour Fine Particulate Matter Nonattainment Area

The Environmental Protection Agency (EPA) is proposing to grant two, one-year extensions to the Moderate attainment date for the 2006 24-hour fine particulate matter (PM2.5) Logan, Utah (UT)-Idaho (ID) nonattainment area. This action is based on the EPA's evaluation of air quality monitoring data and extension requests submitted by the State of Utah on May 2, 2017, and the State of Idaho on December 15, 2015, February 26, 2016, and April 25, 2017. The EPA is proposing to grant a one-year extension of the Moderate attainment date from December 31, 2015 to December 31, 2016, and is proposing to grant a second one-year extension of the Moderate attainment date from December 31, 2016 to December 31, 2017, in accordance with section 188(d) of the Clean Air Act (CAA).