According to a new study, 7.5 million Californians may be using water contaminated with PFAs, chemicals that never break down and have been associated with cancer. Although the Environmental Protection Agency (EPA) advises a cap of 70 parts per trillion (ppt) PFAS in drinking water, the survey found that over 40% of the 74 water systems that were studied had at least one sample with a level of total PFAS over 70 ppt.
The Environmental Working Group (EWG) stated:
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