[Dynamic study on the mutagenic activity of organic concentration of water from one branch port of Huangpu River].

From 1991 to 1994, we studied the mutagenicity of drinking water in Shanghai by seasons by Ames test. The results indicated that the mean value of mutagenic activity of organic concentration on TA98 is 162 revertants per liter. Studies on the four branch ports of Huangpu river showed that they contributed 74% of the total mutagenicity, which accounted for the predominant fraction of the mutagenic activity of Shanghai drinking water. The mutagenicity of Hongkou branch was the highest, accounting for 1/3 of the total mutagenic activity of the 4 branches. Studies showed that the mutagenic activity of organic concentration of Hongkou branch water was declining year by year, and factors affecting the mutagenic activity were analysed.