宜昌市农村集中式供水中砷、氟化物和硝酸盐的健康风险评价

Health risk assessment of arsenic,fluoride and nitrate in drinking water of centralized water supply in rural areas of Yichang City

目的调查宜昌市农村饮用水中砷、氟化物和硝酸盐的含量,并进行初步健康风险评价。方法采集各县市农村集中式供水的出厂水和末梢水,测定其砷、氟化物和硝酸盐含量,并应用水环境健康风险评价模型对检测结果进行评价。结果宜昌市农村集中式供水中砷、氟化物和硝酸盐所致个人年风险均低于国际辐射防护委员会(ICRP)推荐的最大可接受风险水平(5.0×10^(-5)/a)。结论宜昌市农村集中式供水中砷、氟化物和硝酸盐不会对人群健康构成较大威胁。

[Objective]To understand the levels of arsenic,fluoride and nitrate in drinking water in rural areas of Yichang City,and perform a preliminary health risk assessment. [Methods]The samples of factory water and peripheral water from centralized water supply in all counties/cities were collected,to test the levels of arsenic, fluoride and nitrate, and the health risk assessment model of water environment was used to evaluate the test results. [Results] The personal annual risk caused by arsenic,fluoride and nitrate in drinking water from centralized water supply in rural areas of Yichang City were lower than the maximum allowance risk level commended by ICRP（5.0×10-5/a）.[Conclusion]The concentrations of arsenic,fluoride and nitrate in drinking water from centralized water supply in rural areas of Yichang City do not have serious influence to human health.