EPA's new PFAS rules don't account for major source of drinking water contamination hseas EnvSciTech
The findings are from a team led by the Harvard John A. Paulson School of Engineering and Applied Sciences and are published in the journalPFAS are present in fire retardant foams among other products and have been building up in the environment since they were first invented by Dupont in the 1930s and manufactured widely by 3M beginning in the 1950s. Exposures to some PFAS are linked to a range of health risks including cancer, immune suppression, diabetes, and low infant birth weight.
The U.S. military is the largest global user of fire-retardant foams containing PFAS known as AFFF . For decades, hundreds ofacross the U.S. and around the world used AFFF containing high levels of PFAS for fire training drills and fighting fires. AFFF use is one of the largest sources of PFAS contamination in drinking water.
Much of the PFAS at military sites consists of precursors that are omitted from standard analytical methods. Using a method previously developed in the Sunderland lab that captures all precursors in AFFF, the Harvard team modeled the expected duration and contribution of those precursors to. The study finds that contamination of two of the newly regulated PFAS chemicals at one military base on Cape Cod, Massachusetts are sustained by microbial precursor biotransformation in the soil.
The researchers concluded that elevated PFAS exposures downstream of more than 300 U.S. military facilities that used the fire-fighting foams could similarly persist for centuries.
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