2011年兰州市城市生活饮用水及二次供水卫生状况调查

Analysis of sanitary monitoring condition of urban drinking water and secondary water supply in Lanzhou city during 2011

目的:了解2011年兰州市城市生活饮用水及二次供水的出厂水和末梢水卫生状况。方法:根据《生活饮用水卫生标准》GB5749-2006[1]进行检测。监测指标包括感官性状和物理指标、无机非金属指标、金属指标、有机物综合指标、有机物指标、农药指标、消毒副产物及消毒剂指标、微生物指标和放射性指标,城市生活饮用水每份水样监测68项,二次供水每份水样监测7项指标。结果:2011年兰州市城市生活饮用水合格率分别为:市政供水100%,自建水厂供水50%;2011年兰州市二次供水的合格率为99.86%。结论:2011年兰州市城市生活饮用水市政供水合格率明显高于自建水厂供水的合格率,应加强自建水厂的监管。兰州市二次供水卫生状况较好,符合国家标准要求。

Objective：To understand the sanitary condition of urban drinking water and secondary water supply in Lanzhou city during 2011.Methods： According to ＂Sanitary Standard for Drinking Water Quality＂GB5749-2006,the following indices were included in the monitoring： sensory and physical characteristics,inorganic non-metals,metals,organiccomposite,organics,pesticides,disinfectants,disinfection by-products,microbes and radiations.Every urban drinking water sample was monitored by 68 items.Every secondary water supply sample was monitored by 7 items.Results： In 2011,the pass rate of drinking water supplied by municipal government was 100% and the pass rate of drinking water supplied by private water plant was 50%.The pass rate of secondary water supply was 99.86%.Conclusion： The pass rate of drinking water supplied by municipal government is much higher than that supplied by private water plant.Therefore,we should enhance the supervision of private water plant.The sanitary condition of secondary water supply in Lanzhou city during 2011 is qualified and it meets the national standard.