Chester County Gets ‘F’ Air Quality Grade In New Study

By Justin Heinze, Phoenixville Patch, Apr 19, 2018

The American Lung Association released its “State of the Air 2018” report and gave Chester County an F grade for ozone pollution.

The American Lung Association released its “State of the Air 2018” report this week and gave Chester County an F grade for ozone pollution. The study also found that overall, ozone pollution has worsened significantly in America from 2014-2016 compared to its previous report, which looked at 2013-2015.

To determine the pollution grade, the American Lung Association assigned increasing weights to the days when air pollution levels reached higher ranges. Those were added together, and the weighted average was calculated. Grades were then assigned based on that weighted average….

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