EnviroAtlas - Ozone Concentration - Days with 8-hour average over 70 ppb in 2017 for the Conterminous United States
This dataset includes the number of days in 2017 that the maximum 8-hour average ozone concentration predicted by the Community Multiscale Air Quality modeling system (CMAQ) exceeds a threshold value of 70 ppb. This dataset was produced by the US EPA to support research and online mapping activities related to …