Concentrations of per- and polyfluoroalkyl substances (PFAS) in tapwater collected throughout the United States, 2021-22
This dataset contains the concentration and quality assurance results for 34 per- and polyfluoroalkyl substances (PFAS).  409 residential and commercial tapwater samples were collected once between May 2021 and May 2022, in the contiguous U.S., Alaska, Hawaii, Puerto Rico, and U.S. Virgin Islands.  Of these samples …