These levels indicate that the consumption of such fish “is potentially a significant source of exposure” to PFAS, the authors determined. The median level of total targeted PFAS in fish from rivers and streams was 9,500 nanograms per kilogram, while the median in the Great Lakes was 11,800 nanograms per kilogram, according to the study. These samples were acquired through two EPA programs: the 2013-2014 National Rivers and Streams Assessment and the 2015 Great Lakes Human Health Fish Fillet Tissue Study. To draw their conclusions, the researchers evaluated the presence of different types of PFAS in 501 fish fillet samples, collected across the U.S. fish consumption to blood levels of PFAS, while also comparing PFAS levels in freshwater fish with those in commercial seafood samples, the authors explained. “Food has always been kind of the hypothesis of how most people are exposed to PFAS compounds,” corresponding author David Andrews, a senior scientist at the Environmental Working Group, told The Hill.īut Tuesday’s study is the first analysis to connect U.S. Researchers first identified such contamination in catfish that inhabited the Tennessee River in 1979. Sign up for the Morning Report newsletterįish consumption has long been identified as a route of exposure to PFAS, according to the study.
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