Contaminants of emerging concern (CECs), including per- and polyfluoroalkyl substances (PFAS), are of interest to regulators, water treatment utilities, the general public and scientists. This study measured 17 PFAS in source and treated water from 25 drinking water treatment plants (DWTPs) as part of a broader study of 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 the perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) concentrations in the treated drinking water are compared to the existing US Environmental Protection Agency'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 the three DWTPs from one river being dominated by PFOA, while three DWTPs on the second river were dominated by perfluorobutyric acid (PFBA).

新出现的污染物 (CEC)，包括全氟烷基物质和多氟烷基物质 (PFAS)，引起了监管机构、水处理公用事业公司、公众和科学家的兴趣。本研究测量了 25 个饮用水处理厂 (DWTP) 的水源和处理水中的 17 种 PFAS，作为对美国各地饮用水中 CEC 进行更广泛研究的一部分。在所有 50 个样品中均检测到了 PFAS，其中 17 种 PFAS 的总浓度范围为 <1 ng/L 至 1102 ng/L。源水中的 PFAS 总浓度中位数为 21.4 ng/L，处理后的饮用水中的中位数为 19.5 ng/L。比较每个地点的水源和处理水中的 PFAS 总浓度，只有五个地点的 水源和处理水之间存在统计显着差异（即P < 0.05）。当处理后的饮用水中全氟辛酸 (PFOA) 和全氟辛烷磺酸 (PFOS) 浓度与美国环境保护署现行的 PFOA 和 PFOS 饮用水健康建议（每种化学品的 70 ng/L）或其总和进行比较时，DWTP 超过了临界点。25 个分布式污水处理厂中有 6 个位于两条大河沿岸。每个河流水系内的分布式污水处理厂都具有特定的 PFAS 特征，其中一条河流的三个分布式污水处理厂以 PFOA 为主，而第二条河流的三个分布式污水处理厂以全氟丁酸 (PFBA) 为主。