2007-2011年广元市生活饮用水监测

目的对广元市2007-2011年生活饮用水监测结果进行分析,掌握广元市生活饮用水卫生状况,为卫生监督部门提供科学依据。方法水样按照国家标准进行采集﹑检测和评价,对广元市2007-2011年生活饮用水监测结果进行统计分析。结果广元市2007-2011年生活饮用水水质年度合格率分别为87.06%﹑81.94%﹑60.00%﹑37.35%﹑47.46%,平均合格率为63.51%;主要不合格指标是大肠埃希氏菌﹑总大肠菌群﹑浑浊度﹑锰﹑铁﹑菌落总数﹑总硬度等;集中式供水、小型集中式供水、分散式供水水质合格率分别是80.36%、73.33%、23.73%,差异有统计学意义(χ2=63.594,P0.01);枯水期水质合格率是69.62%,丰水期水质合格率是60.43%,差异无统计学意义(χ2=2.756,P0.05)。结论广元市生活饮用水总体合格率较低,应加强监管,加强部门间沟通,促进饮水合格率的上升;集中式供水和小型集中式供水水质优于分散式供水水质。

Monitoring on Drinking Water in Guangyuan City from 2007 to 2011

Objective To analyze and grasp the current hygienic condition of drinking water in Guangyuan city from 2007 to 2011,so as to provide scientific basis for supervision.Methods The drinking water samples were collected,detected and evaluated according to national standard and the data from 2007 to 2011 were analyzed.Results From 2007 to 2011,the qualified rates were yearly 87.06 %,81.94 %,60.00 %,37.35 % and 47.46 % respectively,with an average qualified rate of 63.51%.The indexes which were not compliant to the standard limit were E.coli,total coli-group,turbidity,manganese,iron,total number of colonies and total hardness.The qualified rate of centralized water supply,small centralized water supply,non-centralized water supply was 80.36%,73.33% and 23.73% respectively.Statistical difference was found between the qualified rate of water supply modes(χ2=63.594,P<0.01).No statistical difference was found between the qualified rate of dry season(69.62%) and rate of rainy season(60.43%)(χ2=2.756,P>0.05).Conclusion The total qualified rate of drinking water in Guangyuan city stay at low level,both pertinent supervision and communication among departments should be intensified to elevate the qualified rate of drinking water.The water quality of centralized water supply and small centralized water supply are both better than that of non-centralized water supply.