2008年杭州市城市生活饮用水卫生监测结果分析

Analysis on hygiene monitoring of urban drinking water in Hangzhou in 2008

目的:了解杭州市城市生活饮用水水质卫生状况,为有效监管饮用水卫生安全提供科学依据。方法:2008年对水源水、出厂水、末梢水与二次供水按照国家标准进行采集、检测和评价。结果:共检测样品657件,总合格率为87.79%,水源水、出厂水、末梢水、二次供水检验合格率分别为100%、100%、86.07%、74.17%。末梢水不合格的检测项目主要为锌、氨氮、耐热大肠菌、浑浊度、总大肠菌群;二次供水不合格的检测项目主要为浑浊度和铁。结论:为有效改善水质卫生状况,应对制水工艺进行改进,加大枯水期水质的监测力度,改造陈旧的管网和二次供水系统,对二次供水水箱要定期清洗、消毒和维护。

Objective ： To study the hygiene condition of urban drinking water in Hangzhou and provide a scientific basis for the effective supervising hygiene and safety of drinking water. Methods：The samples of source water, chlorinated water, peripheral water and secondary water supply were collected, detected and evaluated according to the national standards in 2008. Results ： We detected altogather 657 samples, the total qualified rate was 87. 79%. The qualified rates of water source water, chlorinated water,peripheral water and secondary water supply were 100% , 100% , 86. 07 % and 74. 17% ,respectively. Unqualified detected items in peripheral water mainly were the concentrations of zinc, ammonia nitrogen, heat - resistant coliform, turbidity, total coliforms ; Unqualified detected items in secondary water supply primarily were the concentrations of turbidity and iron. Conclusion： Effective measures should be done to improve the hygiene condition, such as to improve of water technology, to increase monitoring of dry season water quality, to improve the old pipe network and secondary water supply systems, to clean, disinfect and maintain regularly secondary water supply tanks.