RESUMO
Objective To investigate the status quo of drinking water toxicology indicators in poor rural areas of Handan, Hebei, and analyze its influencing factors. To provide suggestions and opinions for water quality monitoring and water quality treatment in this area, and to provide new ideas for further promoting the construction of new rural areas in impoverished areas. Methods From 2017 to 2020, 6860 drinking water samples were collected from impoverished rural areas in Handan, Hebei. According to the “Sanitary Standards for Drinking Water” (GB 5749-2006), the toxicological indicators were evaluated. And the logistic regression model was used to analyze the influencing factors of drinking water toxicological indicators in the poor rural areas of Handan, Hebei. Results From 2017 to 2020, the difference in the qualified rate of drinking water toxicological indicators in the poor rural areas of Handan was statistically significant (P＜0.05). And with the increase in years, the pass rate of drinking water toxicology indicators showed an upward trend. Among them, the pass rate was the lowest in 2017, with a pass rate of 87.51%, and the highest in 2020, with a pass rate of 96.81%. From 2017 to 2020, except for carbon tetrachloride, selenium, and cyanide, other toxicological indicators all exceeded the standard to varying degrees. According to the degree of exceeding standard, the top four were fluoride, nitrate nitrogen, hexavalent chromium and lead. Logistic regression model analysis showed that untreated water, not using disinfection equipment as required, non-disinfection, pollution sources, and small-scale water supply were the risk factors for unqualified toxicological indicators (P＜0.05). Conclusion The quality of drinking water in poor rural areas in Handan, Hebei has been greatly improved, and the qualified rate of toxicological indicators has been increasing year by year, and the national policy support has provided an important guarantee for it; however, some toxicological indicators still exceed the standards due to various factors. It is necessary for relevant departments to do a good job in rural water supply projects, strengthen the operation and management of poor rural drinking water safety projects in Handan City, do a good job in rural water source protection, strengthen water plant management, and continuously explore rural drinking water treatment techniques to promote rural water supply development and improve rural drinking water quality.