Spatio-temporal distribution and health risk analysis of toxicological indicators in rural drinking water in Jinzhong City,Shanxi Province,from 2018 to 2022
Objective To investigate the distribution trend of the toxicological index concentration in rural drinking water and evaluate the health risk of drinking water in Jinzhong City,Shanxi Province to provide a scientific basis for ensuring the safety of drinking water quality in rural areas.Methods The monitoring data of toxicological indicators in rural drinking water in Jinzhong City from 2018 to 2022 were collected and evaluated.The compliance rate and concentration distribution trend of toxicological indicators were analyzed to evaluate the health risks of toxicological indicators.Results From 2018 to 2022,the compliance rate of toxicological indicators in rural drinking water in Jinzhong City was 95.67％,showing a trend of first increasing and then slightly decreasing.The detection rates of fluoride and nitrate were relatively higher,and the exceedance rates of arsenic,hexavalent chromium(Ⅵ),fluoride,and nitrate were 0.48％,0.53％,2.46％,and 1.12％,respectively.The exceedance of arsenic,hexavalent chromium,and fluoride was mainly distributed in the Jinzhong Basin region,while the exceedance of nitrate was more scattered.The overall oral carcinogenic risk values of arsenic,cadmium,and hexavalent chromium were 5.29 X 10-5,4.49X 10-5,and 6.44× 10-5,respectively,and the carcinogenic risk value of hexavalent chromium for children was 1.00 × 10 4.Toxicological indicators of non-carcinogenic risk were at a relatively low level.Conclusions The toxicological indicators that exceed the standards in drinking water in rural Jinzhong City are arsenic,hexavalent chromium,fluoride,and nitrate.Hexavalent chromium may pose an oral cancer risk to children.In the future,we should pay more attention to the changing trend of excessive indicators and health risks and take measures to reduce the harm to drinking water.
NETL
NSTL
万方数据
