我国通过大量流行病学调查已一再发现饮水污染与肝癌的发生密切相关。据20世纪70～80年代的调查,在肝癌高发区如江苏省启东县和海门县、上海的南汇县、广西省扶绥县等均提示饮用宅沟水、溏水者其肝癌死亡率明显高于饮用井水者,尤其饮用深井水者肝癌死亡率最低。上海市黄浦江江水被污染后的致突变性与肝癌死亡率也呈一定的相关关系,如杨浦区那时黄浦江江水的Ames试验阳性率为96.9%,其男性肝癌标准死亡率比为101.7;而长桥地区则分别为37.5%和76.3。至于水中的致癌物质,目前尚未完全搞清。近年由于分析技术的进步,已发现被污染的水中有一百多种有机物为致癌、促癌和致突变物。饮水中的有机致癌物有:六氯苯、苯并芘、多氯联苯、氯仿、二溴乙烷、二氯乙烯、氯乙烯、苯并荧蒽等等。近年 In China, a large number of epidemiological investigations have repeatedly found that drinking water pollution is closely related to the occurrence of liver cancer. According to a survey conducted in the 1970s and 1980s, liver cancer high mortality areas such as Qidong County and Haimen County in Jiangsu Province, Nanhui County in Shanghai, and Fusui County in Guangxi Province all suggested that people who drank ditch water and drowning water had significantly higher liver cancer mortality. People who drink well water, especially drinking deep well water, have the lowest mortality of liver cancer. The mutagenicity of Shanghai Huangpu River after being contaminated has a certain correlation with liver cancer mortality. For example, the positive rate of Ames test in Huangpu River during Yangpu District was 96.9%, and the standard mortality rate of male liver cancer was 101.7; The Changqiao area was 37.5% and 76.3 respectively. As for carcinogenic substances in water, it is not yet fully understood. In recent years, due to advances in analytical techniques, it has been found that more than 100 organic substances in the contaminated water are carcinogenic, cancer-promoting, and mutagens. Organic carcinogens in drinking water include: hexachlorobenzene, benzo[a]pyrene, PCBs, chloroform, dibromoethane, dichloroethylene, vinyl chloride, benzofluoranthene, and the like. in recent years