通过絮凝、沉降、过滤、颗粒活性炭（GAC）处理和臭氧氧化等试验，对地表水的处理进行了研究。GAC处理或臭氧氧化都是必要的，以满足15个Co-Pt单元的颜色限制。只有在GAC处理过的废水上，才能在不形成高三卤甲烷（THM）的情况下使用游离余氯进行消毒。二氧化氯的应用导致THM水平非常低。然而，除非事先进行GAC治疗，否则所需剂量很高。氯胺可用作任何治疗方案的消毒剂，不会导致三卤甲烷或其他已知的公共卫生问题。包括8个参考文献、表格、图表。

Treatment of a surface water was investigated in bench-scale and pilot-plant tests that consisted of flocculation, settling, filtration, granular activated carbon (GAC) treatment, and ozonation. Either GAC treatment or ozonation was necessary to meet the color limit of 15 Co-Pt units. Disinfection with a free chlorine residual without formation of high trihalomethane (THM) levels could only be achieved on GAC-treated effluent. Application of chlorine dioxide resulted in very low THM levels. The required dosage, however, was high unless preceded by GAC treatment. Chloramine could be used as a disinfectant with any of the treatment schemes without resulting in THMs or other known public health problems. Includes 8 references, tables, figures.