Analysis Of The Content Of Fluoride,Chloride,Nitrate Nitrogen,Sulfate In Drinking Water In Qijiang District,Chongqing

Objective To analyze the monitoring results of the four common materials of fluoride, chloride, nitrate nitrogen, sulfate in drinking water in qijiang district Chongqing from 2012 to 2015,so as to understand the status of the content of four kinds of material and its distribution in the region, which will provide a scientific basis for the improvement of drinking water quality. Method According to the national standard of the People’s Republic of China, Use the national standard GB/T 5750.5-2006 by ion chromatography. Results Monitoring of the drinking water samples of 924,the mean of the four common materials of fluoride, chloride, nitrate nitrogen, sulfate in drinking water are 0.19mg/L,9mg/L,1.3mg/L,63mg/L. the content of fluoride and chloride in different years from 2012 to 2015(F=2.548,P=0.055;F=2.615,P=0.051), in the plentiful water season and the dry season(t=0.479,P=0.632;t=1.098,P=0.272), in finished water and peripheral water(t=-0.05,P=0.963;t=-1.21,P=0.227) have no statistical difference; but the content of fluoride and chloride in drinking water in rural area are a little higher than in town(t=2.45,P=0.014;t=2.07,P=0.039). And the content of nitrate nitrogen and sulfate in finished water and peripheral water(t=1.75,P=0.080;t=0.42,P=0.272),in rural area and in town(t=-0.31,P=0.760;t=0.57,P=0.567) have no statistical difference. But the content of nitrate nitrogen and sulfate in different years from 2012 to 2015 have statistical difference(F=2.813,P=0.041;F=2.951,P=0.038),and in theplentiful water season are a little higher than in the dry season(Z=-3.349,P=0.001;Z=-5.358,P=0.000).The qualified rates of the four common materials of fluoride, chloride, nitrate nitrogen, sulfate in drinking water in qijiang district are all above 98%.And only the qualified rate of fluoride in rural area is a little lower than in town, all others have no statistical difference. Conclusion The content and qualified rate of fluoride, chloride, nitrate nitrogen, sulfate in drinking water in qijiang district Chongqing from 2012 to 2015 are in line with national standards, the results show that the drinking water is well controlled. But there are a few unqualified, so the pretreatment and monitoring of the drinking water need to be strengthened.