More than 1,500 drinking water systems across the country may be contaminated with the nonstick chemicals PFOA and PFOS, and similar fluorine-based chemicals, a new EWG analysis shows. This groundbreaking finding comes the same day the U.S. Environmental Protection Agency (EPA) is convening a summit to address PFAS chemicals—a class of toxic chemicals that includes PFOA and PFOS, and that are linked to cancer, thyroid disease, weakened immunity and other health problems.
From 2013 to 2015, the EPA mandated national testing for PFAS chemicals in public water systems, yet the full results of this testing, funded by taxpayers, were never made public. Water utilities with the highest concentrations of PFAS chemicals have been publicly identified. But the names of utilities with detectable PFAS contamination below the so-called reporting levels of 10 to 90 parts per trillion, or ppt, were not released. Millions of people were not informed that their water supply is contaminated with these chemicals.