PFAS concentrations in Los Angeles and Santa Ana rivers exceed federal safety limits, posing serious health risks to ...

Study: Water for 42 million Americans contaminated with PFAs. ... PFOS at one sample site averaged 55 parts per trillion (ppt), several times higher than the acceptable limit of 4 ppt.

A 2020 study published by EWG scientists estimated more than 200 million Americans are served by water systems with PFOA or PFOS in their drinking water at a concentration of 1 ppt or higher ...