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PFOS was the key ingredient in Scotchgard, a fabric protector made by 3M, and related stain repellents. The acronym "PFOS" refers to the parent sulfonic acid and to various salts of perfluorooctanesulfonate. These are all colorless or white, water-soluble solids.
2016 The EPA "published a voluntary health advisory for PFOA and PFOS" which warned that "exposure to the chemicals at levels above 70 parts per trillion, total, could be dangerous." [71] 2016 The city of Lake Elmo, Minnesota, sued 3M a second time for polluting their drinking water with PFAS chemicals.
On May 19, 2016, EPA lowered the drinking water health advisory level to 0.07 ppb for PFOA and PFOS. [173] In June 2022 the agency issued updated advisories, stating that "some negative health effects may occur with concentrations of PFOA or PFOS in water that are near zero and below EPA's ability to detect at this time."
The Swedish National Food Agency recommends a drinking water limit of 0.09 μg/L for the sum of 11 PFASs (PFBS, PFHxS, PFOS, 6:2 FTSA, PFBA, PFPeA, PFHxA, PFHpA, PFOA, PFNA and PFDA). If PFASs are found above this limit in drinking water, immediate action is recommended to reduce the PFAS concentration in the drinking water to as far below the ...
Jul. 28—The U.S. Defense Department responded too slowly to reduce the dangers of cancer-causing chemicals used in firefighting foam, despite knowing the health hazards for decades, and then ...
The EPA has published non-enforceable drinking water health advisories for PFOA and PFOS. [142] [143] In March 2021 EPA announced that it would develop national drinking water standards for PFOA and PFOS. [144] Drinking water utilities are required to monitor PFAS levels and may receive subsidies to do so.
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