USGS estimates at least 45% of U.S. tap water contains PFAS

The U.S. Geological Survey has released a study on testing for per- and polyfluoroalkyl substances (PFAS) in private wells and public water supplies. The agency has estimated that based on their results, almost half of the country’s tap water contains at least one PFAS.

Regulatory background

Per- and polyfluoroalkyl substances (PFAS) are a class of synthetic organic chemicals used in many different industrial and commercial applications.

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