2009年-2011年杭州市城市居民生活饮用水水质状况分析

Analysis of drinking water quality in urban area of Hangzhou from 2009 to 2011

目的:了解近三年来杭州市城市居民生活饮用水水质状况,为确保城市居民生活饮用水安全提供科学依据。方法:对2009年-2011年中杭州市疾病预防控制中心受理的出厂水、末梢水、二次供水、生产及餐饮用水进行检测和评价。结果:2509件水质检测样品的总符合率为88.2%,其中出厂水、末梢水、二次供水、生产及餐饮用水的符合率分别为97.4%、89.3%、85.0%、77.1%,呈趋势下降。末梢水、二次供水、生产及餐饮用水的主要不符合项目集中在菌落总数、铁、浑浊度等指标。结论:改造城市管网中老化设施,增加对二次供水储水设备的清洗频次,加强对生产及餐饮企业的水质监管。

Objective：To understand the drinking water quality in urban area of Hangzhou in recent three years,and provide scientific basis to ensure the drinking water safety for urban residents.Methods：Samples were collected from water supply,tap water,secondary water supply,production and catering water accepted by Hangzhou CDC from 2009 to 2011 for detection and evaluation.Results：The results showed that the total qualification rate of 2509 samples was 88.2%,and the qualification rates of samples from water supply,tap water,secondary water supply,production and catering water were 97.4%,89.3%,85.0%,77.1% respectively,showing the trend of decline.The disqualification items of tap water,secondary water supply,production and catering water were total platecount,opacity,iron,et al.Conclusion：Aging equipment of urban water supply network should be improved,storage equipment for secondary water supply should be cleaned frequently and water quality supervision should be strengthened in production and catering industry.