Scientists with the USGS first set out in 2019 to sample 161 waterways as a way of finding potential sources of PFAS contamination from 33 different compounds of the “forever chemicals.”
But a new study by the U.S. Geological Survey study found many of those waterways are also tainted by so-called forever chemicals. The USGS sampled streams across Pennsylvania and found 76% of them contained the presence of at least one compound from the per- and polyfluoroalkyl substances (PFAS) family, according the first study of its kind looking at the problem across a single state and associating possible sources.
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