中文摘要：

2015年4月（春季）在东昌湖沿岸均匀采集21个水样，分析了水样中氮（N）、磷（P）、总砷（As）的质量浓度，并应用美国环保局（USEPA）推荐的健康风险评价模型对东昌湖通过饮用水途径引起的水环境健康风险进行了初步评价。结果表明，水体中总氮（TN）和总磷（TP）的浓度均值分别为2．70mg／L和0．15mg／L，均高于《地表水环境质量标准》（GB3838—2002）Ⅲ类水标准值，且超标率均为100％。总砷的含量为0．13—0．82μg／L，平均值为0．60μg／L。化学致癌物As通过饮水途径产生的健康风险平均值为3．99×10^-6／a，在美国环保局（USEPA）推荐的1．0×10^-6／a～1.0×10^-4／a可接受区间内。由非致癌物氨氮（NH4^＋）和硝态氮（NO3^-）产生的健康风险等级为10^-11～10^-10／a。东昌湖化学致癌物As健康风险值远大于非致癌物质，因此在关注湖水富营养化的同时也须对As做进一步调查。

英文摘要：

A total of 21 water samples were collected uniformly around Dongchang Lake in April 2015. The concentrations of the nitrogen, phosphorus and arsenic were analyzed, and the preliminary health risk involved with the pollutants by drinking water was conducted by using the models of US EPA. The results showed that the total nitrogen and phosphorus in all water samples exceeded the type Ⅲ standard values of GB 3838-2002 National Environmental Quality for Surface Water, and the average concentrations were 2.70 mg/L and 0. 15 mg/L respectively. The total arsenic concentrations were 0.13- 0.82μg/L with an average of 0.60 μg/L which were far lower than its corresponding type Ⅲ standard value of GB 3838-2002. The itidividual carcinogenic risk value caused by As through drinking water with an average of 3.99×10^-6/a, in the tolerate level of 1.0×10^-6/a-1.0 ×10^-4/a recommended by USEPA. The health risk caused by non-carcinogens ammonium （NH4^＋ ） and nitrate （NO3^-） was at the rate of 10^-11-10^-10/a, which were much lower than that caused by the carcinogen As. Therefore, great attention should be paid both to the eutrophication caused by nitrogen and phosphorus and the health risk caused by carcinogen As.