Determination of Attainment by the Attainment Date and Clean Data Determination for the Logan, UT-ID 2006 24-Hour PM2.5

The Environmental Protection Agency (EPA) is proposing a determination of attainment by the attainment date and a clean data determination (CDD) for the 2006 24-hour fine particulate matter (PM2.5) Logan, Utah (UT)-Idaho (ID) nonattainment area. The determination is based upon quality-assured, quality-controlled and certified ambient air monitoring data showing that the area has attained the 2006 24-hour PM2.5 National Ambient Air Quality Standards (NAAQS) based on 2015-2017 data available in the EPA's Air Quality System (AQS) database. Based on the proposed determination that the Logan, UT-ID nonattainment area is currently attaining the 24-hour PM2.5 NAAQS, the EPA is also proposing to determine that the obligation for Utah and 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 not applicable for as long as the area continues to attain the NAAQS.