Where the EPA Has Found PFAS in Freshwater Fish

The U.S. Environmental Protection Agency has conducted three studies of fish contamination in rivers and streams since 2008 and two studies in the Great Lakes since 2010. Some researchers worry far more rivers, streams, and lakes hold fish laced with high levels of PFAS.

Note: Amounts are based on a composite of 1-10 fish. A third study of fish in the Great Lakes was conducted in 2020 but results have not yet been released. PFOS, or perfluorooctane sulfonic acid, is a common PFAS chemical found in fish.
Sources: Environmental Protection Agency's National Rivers and Streams Assessment Fish Tissue Studies and Great Lakes Human Health Fish Tissue Studies
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