| Objectives:To investigate the hygienic quality of drinking water and change trend in the rural area of Wei Fang during 2008-2013,and elucidate the total hygienic quality of drinking water in the rural area of Wei Fang,explorer the development trend,analysis influence factors,find potential safety hazard,so we can provide theoretical basis for the supervision,surveillance and policy making of the ministry of water resources and health.Methods:We applied unified survey of basic conditions in every early year,and combined with the ministry of water resources to carry on the investigation of the centralized water supply system in the rural area of Wei Fang.We analyzed the data from the basic investigation,and applied stratified random sampling to choose water supply sector as monitoring point from 14 countries of Wei Fang according to geographical position,the number of water supply sector,types of water resources and the situation of disinfection.We collected water sample each one time in the dry season(March to May)and rain season(July to September)by every monitoring point,and each time we collect finished water and tap water each one sample,though we collect four samples from each monitoring point every year.The method of collection,preservation,transportation and detection for the water samples were carried on according to GB5750-2006《the detection method of drinking water》.The results of detection were evaluated according toGB5750-2006《the hygienic standard of drinking water》,the detection result would be judge unqualified if only one detection index was unqualified.We gathered,audited and analyzed the basic situation and detection results of water samples in June and October every year.We applied software of Excel and SPSS to analysis the data of basic situation and detection results every year,and applied rate to analysis enumeration data,then carried on x2test and two-category logistic regression to analysis population rate,development trend and influencing factors.Results:We collected 4072 water samples of drinking water from the rural area in WeiFang,among them 1677 samples were qualified,the total qualified rate was 41.18%.The number of monitoring point we chose was 228,85,105,230,260 and 110 every year during 2008 to 2013,the qualified rate each year was 17.76%,28.24%,40.24%,49.57%,50.77%and 60.45%,the qualified rate was improved gradually each year.Through χ2 test,the difference of total qualified rate had statistical significance each year during 2008 to 2013(χ2=363.80,P<0.05).The total qualified rate of water samples in dry season was 10.31%,32.36%,49.52%,34.35%,52.20%and 65.00%during 2008 to 2013,and the difference had statistical significance(χ2=278.70,P<0.05).The total qualified rate of water samples in rain season was25.22%,24.12%,30.95%,64.78%,49.04%and 55.91%,and the difference had statistical significance(χ2=205.65,P<0.05).The total qualified rate of finished water was 20.18%,31.18%,42.86%,51.74%,53.27%and 62.27%during 2008 to 2013,and the difference had statistical significance(χ2=175.86,P<0.05).The total qualified rate of tap water was 15.35%,25.29%,37.62%,47.39%,48.27%and 58.64%,the difference had statistical significance(χ=189.16,P<0.05).Through analyzed the influencing factors of the total qualified rate,we found that the association between drinking water type,the scale of water supply project and the detection results of water samples had statistical significance(P<0.05).Conclusions:The drinking water sources mainly were groundwater in the rural area of We iFang during 2008 to 2013,the scales of water supply project mainly were miniature centralized project,but the huge projects for drinking water were less,and most of water wasn’t disinfected before providing to people.The qualified rate of drinking water in the rural area of Wei Fang was increased gradually during 2008 to 2013,but the total qualified rate was still quite low.This situation would result in many reasons,such as the choose of monitoring point,the pollution of water resource,the poor management and imperfect equipment of miniature centralized water supply project in the rural area,capital scarcity,the distribution of water supply network,the poor sense of basic staff and rural residents.Therefore,we suggest that the whole society should take a high attention to the protection of water resource,raise money by many aspects to guarantee the fund about reforming and operating the drinking water project in the rural area,apply drinking water by large-medium project as many as possible,strengthen the detection and surveillance of the drinking water in the rural area overall,realize the importance of disinfection to the drinking water adequately,improve the knowledge level about drinking water hygiene towards basic water-supply and management staff. |
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