Abstract：Objective To analyze the level of nitrate in drinking water of rural self-sufficient-wells and its distribution characteristics in Fengtai district of Beijing, and to provide data support for rural water safety improvement and health risk management. Methods The monitoring data of nitrate in water of self-sufficient-wells in each township in Fengtai district during 1999-2015 were used for analyzing the distribution characteristics of nitrate level in water of self-sufficient-wells in diffenent rural areas. Results The qualified rate of nitrate in water of rural self-sufficient-wells in Fengtai district during 1999-2015 was 44.06% (267/606). The lowest qualified rate was found in Huaxiang (14.84%), while the highest qualified rate in Changxindian (100.00%). The level of nitrate in water of rural self-sufficient-wells was higher in the Hedong area than in the Hexi area (29.85 mg/L vs. 2.38 mg/L), with a statistically significant difference (P<0.001). The level of nitrate in water of rural self-sufficient-wells in different townships showed statistically significant differences (P<0.001), and it was found to be the highest in Huaxiang (34.50 mg/L), followed by Lugouqiao (26.70 mg/L), Nanyuan (25.00 mg/L), Wangzuo (2.89 mg/L) and Changxindian (1.82 mg/L). There were statistically significant differences in the level of nitrate in water of self-sufficient-wells among the five townships in each year during 1999- 2015. Conclusions The level of nitrate in water of self-sufficient-wells in the Hedong area of Fengtai district in 1999-2015 was higher than that in the Hexi area, and there were statistically significant differences among the five townships within the seventeen years. To ensure the residents’ health related to drinking water, it is suggested that the government should strengthen the treatment of nitrate pollution in water of self-sufficient-wells in Hedong area, which can be gradually promoted in accordance with the order of Huaxiang, Lugouqiao and Nanyuan.
2019, Vol. 26 
