我国典型地区饮水中致突变性表征

报道上海，昆明，哈尔滨、沈阳、广州、武汉和深圳等城市自来水的致突变性特征，以及上述城市自来水厂源水及其氯化源水致突变性的比较研究。发现７城市自来水中均含有移码型直接致突变物。ＴＡ９８菌株是最敏感的监测菌株。另外，按水样比活性和沈集物比活性和沈集物比活性为指标，则上海，昆明，哈尔滨、沈阳、广州和武汉等６城市自来水厂氯化源水对ＴＡ９８和ＴＡ１００２菌株的致突变性均明显地高于源水，上海市尤为突出。该结果

Characteristics in Mutagenicity of the Drinking Water from Representative Areas in China

he tap waters,raw waters and chlorinated raw waters from the waterworks in Shanghai,Kunming,Harbin,Shengyang, Guangzhou, Wuhan and Shenzhen cities were studied for their characteristics in mutagenicity by using an Ames Test.All the tap waters were found to contain direct mutagens of frameshift, with strain TA98 to be the most sensitive strain for such a monitol'ing.The oh1Grinated raw waters from all the cities except for shenzhen were found to have significantly a stronger mutagenic activity than their raw waters in both strain TA98 and TA100,with and without Sg, as evaluated in terms of relative activity by water volume (rev./L)or by weight of water concentrate(rev./ mg ),particularly in the case of Shanghai.The results provide a scientific basis for selecting representative cities to study the mechanism on the formation of toxic chlorinated organics during chlorination of drinking water.