WASHINGTON — A new report issued by the Environmental Working Group says that D.C. and Prince George’s County have some of the highest levels of per- and polyfluoroalkyl substances, or PFAS, compared to some major cities across the country. 
"New laboratory tests commissioned by EWG have for the first time found the toxic fluorinated chemicals known as PFAS in the drinking water of dozens of U.S. cities, including major metropolitan areas. The results confirm that the number of Americans exposed to PFAS from contaminated tap water has been dramatically underestimated by previous studies, both from the Environmental Protection Agency and EWG’s own research," the report said...