Wisconsin: Using Maps to Tackle 'Forever Chemicals' The thought of so-called forever chemicals coursing through bodies of water or across the earth’s surface paints an ominous picture. Substantial efforts are now under way to combat PFAS, a notoriously pervasive class of contaminants. In Wisconsin, teams are mapping the prevalence of these dangerous chemicals in drinking water supplied by two of the world’s largest lakes. “We all have PFAS in our blood at this point,” said Melanie Johnson, director of the Office of Emerging Contaminants at the Wisconsin Department of Natural Resources (DNR). “We’re all kind of dealing with it.” Since the 1940s, toxic chemicals have been used to create a multitude of industrial and consumer products, including firefighting foam and household cleaners. PFAS have traveled 66 Wisconsin contains more than 15,000 lakes that provide drinking water as well as recreational opportunities.
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