State of the Air: Ozone grades

The American Lung Association tallied the level of ozone in select counties and assigned grades based on how high the levels were. The ALA's methodology differs from the EPA, so a county may fail under this metric but not violate a governmental standard. Search or sort the table to see the grades near you.

Note: DNC (Data Not Collected) indicates that data on that particular pollutant was not collected in that county during the three years covered in the report.
Chart: Daniel Wheaton | Midwest NewsroomSource: American Lung AssociationGet the dataCreated with Datawrapper