摘要
Based on the health risk assessment model of water quality recommended by United States Environmental Protection Agency (USEPA), the health risk of five centralized drinking water sources in small towns of Beibei District, Chongqing City was evaluated. The results showed that the risk of health hazard of chemical carcinogen arsenic did not exceed the acceptable level recommended by the International Commission on Radiological Protection (ICRP)(5.0×10 -5 a -1 ), but was still at the same order of magnitude as the recommended value of ICRP. The risk of the highest health hazard was 127 times higher than the maximum acceptable level recommended by Sweden EPA and Holland EPA (1.0×10 -6 a -1 ). The health risk of As in genetic toxic substances at monitoring points A, B, and C accounted for 99.99% of the total risk, showing that As was the main pollutant that posed the health risk, so priority should be given to the prevention and control of As pollution in the centralized drinking water sources in Chongqing towns.
Based on the health risk assessment model of water quality recommended by United States Environmental Protection Agency（ USEPA）,the health risk of five centralized drinking water sources in small towns of Beibei District,Chongqing City was evaluated. The results showed that the risk of health hazard of chemical carcinogen arsenic did not exceed the acceptable level recommended by the International Commission on Radiological Protection（ ICRP）(5. 0 × 10-5a（-1）),but was still at the same order of magnitude as the recommended value of ICRP. The risk of the highest health hazard was 127 times higher than the maximum acceptable level recommended by Sweden EPA and Holland EPA(1. 0×10-6a-1). The health risk of As in genetic toxic substances at monitoring points A,B,and C accounted for 99. 99% of the total risk,showing that As was the main pollutant that posed the health risk,so priority should be given to the prevention and control of As pollution in the centralized drinking water sources in Chongqing towns.
基金
Supported by Scientific Research Planning Project of Beibei District,Chongqing City(2017-18)
