Mat-Su - Butte - PM2.5
|98th Percentile PM2.5 24-hr Average Concentration, µg/m3||2015||2016||2017||Design Value||Cannot Exceed*|
*Compliance with the 24-hr PM2.5 National Ambient Air Quality Standard (NAAQS) is determined using three years of air monitoring data. The design value (DV) is an average of 98th percentile 24-hr average PM2.5 concentrations over three years. The 2014-2016 DV is 35.1 µg/m3. The NAAQS is currently 35 µg/m3, an area is considered to violate the standards if the DV is 35.5 µg/m3 or above.