2011年北京市怀柔区农村集中式供水微生物指标检测结果分析

Analysis on testing results of microbiological indicators of rural central water supply in Huairou District of Beijing City in 2011

目的了解北京市怀柔区农村集中式供水水质卫生状况,为农村改水提供依据,以保障人民群众日常饮水安全。方法在辖区建立59个农村集中式供水水质监测点,对监测点消毒情况及水源类型进行调查,并在枯、丰水期采集出厂水、末梢水各1件,全年共检测水样236件。结果 2011年农村集中式供水236件水样合格率71.6%。枯水期与丰水期比较,差异有统计学意义(χ2=25.53,P<0.01)。总大肠菌群、耐热大肠菌群和菌落总数超标率分别为24.6%、21.2%和19.9%。结论怀柔区农村集中式供水微生物指标超标现象严重,今后应加强集中式供水管网配套设施的安装,针对不合格指标提出具体的改进措施,改善农村集中式供水水质卫生状况,以保障人们身体健康。

[ Objective] To understand the water quality of rural central water supply in Huairou District,to provide evidence for re- formation of rural drinking water, so as to ensure the safety of daily drinking water. [ Methods ] Fifty nine monitoring points of rural central water supply were set up in this district, the sterile conditions and water source types were investigated. A total of 236 water samples collected from treated water and tap water in dry and wet seasons were detected annually. [ Results ] Of 236 water samples, the qualified rate was 71.6%. The difference between dry and wet seasons was significant（ ~2 =25.53 ,P 〈0.01 ）. The unqualified rate of total coliform group, thermotolerant coliforms and total bacteria counts was 24. 6%, 21.2%, 19.9%, respectively. [ Condttsion] The microbiological indicators of rural central water supply in Huairou District exceed standards seriously. The instal- lation of the centralized central water supply network of supporting facilities should be strengthened in the future. Specific improve- ment measures targeted on the unqualified indicators should be put forward to improve the quality of water supplies in rural area and ensure people＇s health.