EnviroAtlas - Particulate Matter Concentration (PM2.5) - Days over 35 micrograms per cubic meter in 2017 for the Conterminous United States
This raster GIS dataset includes the number of days in 2017 that the concentration of particulate matter with a diameter of 2.5 micrometers or smaller (PM2.5) predicted by the Community Multiscale Air Quality modeling system (CMAQ) exceeds a threshold value of 35 micrograms per cubic meter.  This dataset was produced …