Both St. Louis city and county performed poorly in the American Lung Association’s latest air quality report.
The ALA gave St. Louis County an “F” for its ozone grade in the organization’s State of the Air report for 2018.
The ALA analyzed ozone and short-term levels of particle pollution and then assigned increasing weights to the days when air pollution levels reached higher ranges to calculate the grades. St. Louis County also received a “C” grade for particle pollution.
