本文对同一原水分别经单氯和氯胺消毒两种工艺制成的自来水中产生的三氯甲烷含量进行了对比，实验表明：当水中含有一定量的氨时，氯消毒所产生的副产物三氯甲烷的含量显著减少，其生成量与氨的投加量呈一定的反比例关系。因此，氯胺消毒法对降低自来水中三氯甲烷含量是有效的。 This article compares the trichloromethane content in the tap water produced by the same raw water with the two technologies of monochlorination and chloramine disinfection. The experiment shows that when the water contains a certain amount of ammonia, the by-product produced by chlorine disinfection is three. The content of chloromethane was significantly reduced, and the amount of chloromethane was inversely proportional to the amount of ammonia added. Therefore, the chloramine disinfection method is effective in reducing the chloroform content in tap water.