湖泊饮用水源地水环境健康风险评价

根据某湖泊饮用水源地水环境质量监测资料，采用美国环境保护署(US EPA)推荐的水环境健康风险评价模型，对2处饮用水源地原水通过饮水途径引起的水环境健康风险进行了评价.结果表明:在2处饮用水源地水环境质量监测项目中，对人体有健康风险的有毒污染物主要是化学致癌物As和Cr(Ⅵ)；个人化学致癌物总年风险远大于非致癌物总年风险；2003─2007年2处饮用水源地水环境健康个人总年风险均超过国际辐射防护委员会(ICRP)推荐的标准，主要原因是化学致癌物As和Cr(Ⅵ)的质量浓度过高；因此，加强治理和控制化学致癌物特别是As和Cr(Ⅵ)是降低该湖泊饮用水源地水环境健康风险的有效途径. 

Water Environmental Health Risk Assessment in Lake Sources of Drinking Water

Based on water quality monitoring data, the water environmental health risk assessment model of EPA was employed to study the potential health risks brought by drinking from two lake drinking water sources.The results indicated that in the water quality monitoring data of the lake, the main hazardous pollutants that threaten human health were chemical carcinogens, As and Cr(Ⅵ); the health risks of carcinogens to individuals were much higher than those of non-carcinogens; and, the overall individual annual health risks in the two drinking water sources from 2003 to 2007 all exceeded the standards recommended by ICRP, owing to over-high mass concentration of As and Cr(Ⅵ).Therefore, stricter governing and controlling of carcinogens, especially As and Cr(Ⅵ), is an effective way to reduce the health risks in lake drinking water sources.