Analysis of the Monitoring Results of Six Physicochemical Indicators for Rural Drinking Water in a City from 2011 to 2018

Objective To understand the pass rates for fluoride, nitrate nitrogen, chloride, sulfate, total hardness, and total dissolved solids for rural drinking water in a city and provide a basis for strengthening the hygiene management of drinking water.

Methods The collection, storage, and analysis of water samples were carried out according to the Standard examination Methods for Drinking Water (GB/T 5750-2006). The test result were evaluated according to the Standards for Drinking Water Quality(GB 5749-2006). SPSS was used for the statistical analysis of test result.

Results From 2011 to 2018, the qualification rate of rural drinking water in this city had an increasing trend. District A had the highest pass rate in all counties, followed by County B, and District E had the lowest pass rate, followed by County C. The qualified rate of surface water in monitoring points was much higher than that of groundwater, and both had a rising trend. Fluoride, Nitrate Nitrogen, Chloride, Sulfate, Total Dissolved Solids, and Total Hardness 6 index pass rates differed statistically from year to year, and also tended to increase.

Conclusion From 2011 to 2018, rural drinking water in this city constantly improved, while the pass rates for sulfate, total hardness, and total dissolved solids remained relatively low. Relevant departments should strengthen the monitoring of current failed indicators to ensure the safety of drinking water for rural residents in this city.