Perfluoroalkyl substances (PFASs) can occur in water sources, pass through drinking water treatment plants (DWTPs), drinking water distribution systems (DWDSs), to the consumer taps. This investigation was carried out to present the transportation behaviors of 17 PFASs, involving seven DWTPs with different water sources, raw water transportation modes, treatment processes, and DWDS structures in eastern and northern China. The results showed that the long-distance raw water transportation pipelines removed a certain extent of PFASs from raw water, probably due to the accumulation of loose deposits. The long-distance, open-channel South-to-North water diversion increased PFAS contamination risk. In the DWTPs, granular activated carbon (GAC) adsorption and ultraviolet radiation removed less than 25% of PFASs, but ozonation-biological activated carbon (O₃-BAC) was superior to GAC alone in removing PFASs. Loose deposits couldsignificantly influence PFAS accumulation and release within branch-structured DWDSs. In loop-structured DWDSs, finished water with different PFAS characteristics could mix along the pipeline, with the corresponding DWTP as the center, ultimately forming a relatively uniform distribution in the entire DWDS.

全氟烷基物质（PFAS）可以存在于水源中，通过饮用水处理厂（DWTP），饮用水分配系统（DWDS）到达用户水龙头。进行了此项调查，以研究17种PFAS的运输行为，涉及七个在华东和华北不同水源，原水的运输方式，处理工艺和DWDS结构的DWTP。结果表明，长距离原水输送管道从原水中去除了一定程度的PFAS，这可能是由于疏松的沉积物堆积所致。长距离，明渠南水北调增加了PFAS污染的风险。在DWTP中，颗粒状活性炭（GAC）的吸附和紫外线辐射去除了少于25％的PFAS，_3- BAC）在去除PFAS方面优于单独的GAC。松散的沉积物可能会严重影响PFAS在分支结构DWDS中的积累和释放。在环形结构的DWDS中，具有不同PFAS特性的成品水可以沿管道混合，以相应的DWTP为中心，最终在整个DWDS中形成相对均匀的分布。