Steam billows out of U.S. Steel's Clairton Coke Works on March 5, 2019 in Clairton, Pa. The coke plant has come under scrutiny after a Dec. 24 fire triggered an air quality alert from the release of sulfur dioxide.
The @lungassociation released its “State of the Air 2019” report and gave Pittsburgh’s metro area an “F” grade for air quality. According to the report, Allegheny County remains the only county in the United States, outside of the state of California, to get failing grades in both soot and ozone categories.
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