Terrestrial Condition Assessment (TCA) Ozone Acute Exposure (Map Service)
The average of N100 which is the sum of hours over 100 ppb in a given month and captures peak events of high exposure or acute exposure. Updated through 2018. Data used are sourced from the EPA's Air Quality System Data Mart: https://aqs.epa.gov/aqsweb/airdata/download_files.html