Abstract：Objective To evaluate the potential health risk of chemical pollutants in rural centralized water supply in Chongqing Municipality in 2015, and to provide a scientific basis for the risk management. Methods We firstly selected 22 districts or counties, secondly selected 70% of the townships in each district or county, and thirdly selected 1-2 rural centralized water supply monitoring points in each township. Factory water samples were collected in the wet season in 2015, and then the health risk of 17 kinds of chemical pollutants in drinking water was evaluated according to the health risk assessment model recommended by US EPA.Results The annual average total health risk of factory water in rural centralized water supply in Chongqing was 1.59×10-6 (a-1), and the non-carcinogenic health risk accounted for less than 1% of the total risk. The risk was mainly from the chemical carcinogens (including chromium, arsenic and chloroform) in water, with the proportion of total health risk being 48.5%, 45.4% and 5.2% respectively. The health risk of factory water in rural centralized water supply in Chongqing was lower than the maximum acceptable risk level (5×10-5 (a-1)) recommended by International Commission on Radiological Protection (ICRP), but slightly higher than the maximum acceptable risk level (1×10-6 (a-1)) recommended by the Swedish Environmental Protection Agency. Conclusions The total health risk of factory water in rural centralized water supply in Chongqing Municipality is slightly higher than the maximum acceptable risk level recommended by the Swedish Environmental Protection Agency; and hence, more attention should be paid to it. It is necessary to continuously strengthen the monitoring and control of the chemical pollutants in the rural centralized water supply with the health risk higher than 1×10-6 (a-1). In the risk management of rural centralized water supply in Chongqing Municipality, the pollution indicators that should be given priority to control are chromium, arsenic and chloroform.
赵怡楠, 罗书全, 向新志, 周倩如, 王正虹. 2015年重庆市农村集中式供水化学污染指标健康风险评价[J]. 实用预防医学, 2018, 25(7): 833-836.
ZHAO Yi-nan, LUO Shu-quan, XIANG Xin-zhi, ZHOU Qian-ru, WANG Zheng-hong. Health risk assessment of chemical pollution indicators in rural centralized water supply in Chongqing Municipality, 2015. , 2018, 25(7): 833-836.
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2018, Vol. 25 
