评估处理工艺对农药浓度、水源和环境的影响 从12个社区供水系统（CWSs）收集成品（处理）水样 并分析了水溶性农药。最常在空气中检测到的农药 水源为三嗪类除草剂（阿特拉津、氰嗪、普罗米酮和西马嗪） 以及氯乙酰苯胺类除草剂（乙草胺、甲草胺和异丙甲草胺）。阿特拉津， 在饮用水水源和成品水中检测到异丙甲草胺、普罗米酮和西马嗪 每个系统都进行了采样。在源中检测到降解物去乙基阿特拉津，并完成了试验 除了一个，所有CWS的水。三嗪类和氯乙酰苯胺类除草剂通常是 在处理过程后的成品水中检测到，尽管对于大多数处理 植物在成品水中的浓度显著降低。 其他杀虫剂 在水源水中检测到，尤其是有机磷杀虫剂和其他含硫物质 杀虫剂（二嗪酮、毒死蜱、马拉硫磷和灭草净），治疗 这个过程要么完全去除了农药，要么完全降解了农药。包括33个参考文献、表格和图表。

To evaluate the effect of the treatment process on pesticide concentration, source water and finished (treated) water samples were collected from 12 community water systems (CWSs) and analyzed for water-soluble pesticides. The pesticides most frequently detected in the source water were the triazine herbicides (atrazine, cyanazine, prometon, and simazine) and the chloroacetanilide herbicides (acetochlor, alachlor, and metolachlor). Atrazine, metolachlor, prometon, and simazine were detected in the source and finished water of every system sampled. Deethylatrazine, a degradate, was detected in the source and finished water of every CWS but one. The triazine and chloroacetanilide herbicides were usually detected in the finished water after the treatment process, although for most treatment plants the concentrations were significantly less in the finished water. For other pesticides detected in source water, especially the organophosphate insecticides and other sulfur-containing pesticides (diazinon, chlorpyrifos, malathion, and metribuzin), the treatment process either removed or degraded the pesticide completely. Includes 33 references, tables, figures.