Dataset associated with "Could the exception become the rule? "Uncontrollable" air pollution events in the U.S. due to wildland fires"

The dataset gives the days when O3, PM2.5, and PM10 exceeded the National Ambient Air Quality Standards and were also flagged for an exceptional event in the Environmental Protection Agency (EPA) Air Quality System (AQS) database over the recent 18-year period (2000-2017). We have connected those day(s) with an exact event (e.g., a specific wildland fire, high wind period, stratospheric O3 intrusion, agricultural or prescribed burn). We have also gathered information on the number of Exceptional Event Demonstrations (EED) along with the total number of days (for each EED) submitted by each state (on a county-by-county basis), and the days that were concurred and denied by EPA. We have also included supporting documents for the exceptional day(s).