Rainwater in parts of US contain high levels of PFAS chemical, says study

Levels high enough to potentially impact human health and trigger regulatory action, which only targets two of 4,700 variants

New data shows that rainwater in some parts of the US contains high enough levels of potentially toxic per- and polyfluoroalkyl substances (PFAS) to possibly affect human health and may, if found in drinking water, in some cases be high enough to trigger regulatory action.

PFAS chemicals appear in an array of everyday items, such as food packaging, clothing and carpeting. Chemicals in this family are the subject of the film Dark Water, which chronicles the real-life efforts of a lawyer seeking to hold a polluting factory to account in West Virginia.