Air quality in the Lancaster region is once again ranked among the worst in the nation, with pollution levels that pose threats to both human and environmental health. Short-term particulate pollution earned Lancaster a failing grade in the American Lung Associationâs 2021 State of the Air report. Released today, the report is based on measurement of airborne pollutants in more than 200 metropolitan areas for the years 2017 through 2019, the most recent period for which accurate data is available. Particulate pollution can pose a threat to human health by exacerbating asthma, allergies a...