故县水库水源地水质风险评估

为治理水环境生态，确保水源地水质，根据故县水库水质实测数据，应用健康风险评估模型对该水库基因毒物质和躯体毒物质的个人健康危害风险进行评估。结果表明：（1）该水库2009—2015 年各类污染物的个人健康危害年均风险为4.24×10-5，低于国际辐射防护委员会推荐的最大可接受风险值5.0×10-5/a，但高于瑞典、荷兰等国建议的最大可接受值1.0×10-5/a；（2）致癌物质通过饮水途径对人体健康危害的风险值排序为Cr>As>Cd，非致癌物质由饮水途径对人体健康危害的风险值排序为F->Cu>Pb>Hg>NH3-N>CN->Se>Zn>酚；致癌物质对人体产生的危害风险远大于非致癌物。还需加强水土保持工作、严防农业面源污染、倡导科学养殖，确保群众饮用水安全。

Water quality risk assessment in Guxian Reservoir water source

To control water environmental ecology and ensure the safety of water source, we assessed the individual health hazard risk of genetic toxic and body toxic substances by applying the health risk assessment model based on measured data of water quality in Guxian reservoir. The results showed that: (1) the annual individual health hazard risk of all kinds of pollutants was 4.24×10-5 from 2009 to 2015 in the reservoir, which was lower than the maximum acceptable annual value of 5.0 × 10- 5/a recommended by the International Radiation Protection Committee, but higher than the risk value of 1.0 × 10- 5/a suggested by Sweden and Netherlands; (2) through drinking water, the risk value of carcinogenic substances to human health hazards was: Cr>As>Cd, and the risk value of non-carcinogenic substances was: F->Cu>Pb>Hg>NH3-N>CN->Se>Zn> phenol; the risk of carcinogens was more dangerous to the human body than that of non-carcinogens. It is necessary to strengthen soil and water conservation work, strictly prevent agricultural non- point sources pollution, promote scientific breeding, to ensure the safety of drinking water.