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PER- AND POLYFLUOROALKYL SUBSTANCES IN SOURCE AND TREATED DRINKING WATERS OF THE UNITED STATES
Boone, J.S., C. Vigo, T. Boone, C. Byrne, J. Ferrario, R. Benson, J. Donohue, J.E. Simmons, D.W. Kolpin, E.T. Furlong, and S.T. Glassmeyer.
Science of the Total Environment 653:359-369(2019)

Scientists measured 17 per- and polyfluoroalkyl substances (PFASs) in source and treated water from 25 drinking water treatment plants (DWTPs) as part of a broader study of contaminants of emerging concern (CECs) in drinking water across the United States. PFAS were quantitatively detected in all 50 samples, with summed concentrations of the 17 PFAS ranging from <1 ng/L to 1102 ng/L. The median total PFAS concentration was 21.4 ng/L in the source water and 19.5 ng/L in the treated drinking water. Comparing the total PFAS concentration in source and treated water at each location, only five locations demonstrated statistically significant differences (i.e., P <0.05) between the source and treated water. When PFOA and PFOS concentrations in the treated drinking water were compared to the existing U.S. EPA's PFOA and PFOS drinking water heath advisory of 70 ng/L for each chemical or their sum, one DWTP exceeded the threshold. Six of the 25 DWTPs were along two large rivers. The DWTPs within each of the river systems had specific PFAS profiles, with three DWTPs from the first river dominated by PFOA, while three DWTPs on the second river were dominated by perfluorobutyric acid (PFBA). This paper is Open Access at https://www.sciencedirect.com/science/article/pii/S004896971834141X.



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