A study to monitor atrazine (ATZ) and its metabolites (ATZs) (including DEA, deethylatrazine; DIA, deisopropylatrazine; HA, hydroxyatrazine) in drinking water treatment plants from water source to consumers tap in Zhoukou City was undertaken. A total of 20 source water, 36 finished water, and 36 tap water samples were collected during the period from July to August in 2020. Based on the survey results, a human health non-carcinogenic and carcinogenic risk assessment was conducted for adults and children. The results showed that the ΣATZs concentrations in source water, finished water, and tap water ranged from 0.609 to 55.985ng/L (mean=6.065ng/L), 0.445 to 46.3ng/L (mean=4.507ng/L), and 0.475 to 91.9ng/L (mean=7.139ng/L), respectively. The predominant compounds of ATZs in tap water was ATZ, with a detection frequency of 91.67%, followed by DIA (58.33%), DEA (52.78%), and HA (27.78%). The highest concentrations of ΣATZs (mean=15.110ng/L) in tap water was found in the Central of Zhoukou City,...

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