Of tap water samples taken by EWG from 44 sites in 31 states and Washington D.C., only one location, Meridian, Mississippi, which relies on 700 foot (215 m) dee

Of tap water samples taken by EWG from 44 sites in 31 states and Washington D.C., only one location, Meridian, Mississippi, which relies on 700 foot (215 m) deep wells, had no detectable PFAS. Only Seattle and Tuscaloosa, Alabama had levels below 1 part per trillion (PPT), the limit EWG recommends. In 2018 a draft report from an office of the U.S. Department of Health and Human Services said the risk level for exposure to the chemicals should be up to 10 times lower than the 70 PPT threshold the EPA recommends. The article is all over the place with various recommendations. Seems to boil down (no pun intended) to: * EPA recommends less than 70 parts per trillion * US Department of Health and Human Services recommends less than 7 parts per trillion. * EWG recommends less than 1 part per trillion and states in their report that only 3 out of 44 sites they tested met that much more stringent standard.