目的了解徐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11月—2010年5月对5处市政供水出厂水、20处末梢水、3处自建水厂出厂水、每个自建水厂2处末梢水与20处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515份,合格水样422份,水样合格率为81.9%;检测7 306项次,合格7 106项次,项次合格率为97.3%。不合格的主要指标是游离性余氯、总硬度、三卤甲烷和总大肠菌群,合格率分别为55.0%、66.7%、81.5%和94.8%。市政供水出厂水、末梢水和二次供水检验合格率分别为50.0%、65.2%、56.3%。末梢水不合格的指标主要为游离性余氯、总硬度、三卤甲烷和总大肠菌群;二次供水不合格的指标主要为游离性余氯和总大肠菌群。结论为有效改善水质卫生状况,应对制水工艺进行改进,加大丰、枯水期水质监测力度,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 understand the sanitary status of urban drinking water in Xuzhou and provide a scientific basis for the effective supervision of the sanitary safety of drinking water. Methods From November 2008 to May 2010, five municipal water supply, 20 peripheral water, three self-built waterworks and two self-built waterworks perimeter water and 20 secondary water supplies were prepared according to the national Standards for collection, testing and evaluation. Results A total of 515 samples were tested and 422 water samples were qualified. The passing rate of water samples was 81.9%. 7 306 tests were conducted and 7 106 tests were qualified. The passing rate of the items was 97.3%. The main indicators of unqualified free residual chlorine, total hardness, trihalomethanes and total coliform bacteria, pass rates were 55.0%, 66.7%, 81.5% and 94.8%. Municipal water supply factory water, peripheral water and secondary water supply test pass rates were 50.0%, 65.2%, 56.3%. The indicators of unqualified peripheral water were mainly free residual chlorine, total hardness, trihalomethanes and total coliform bacteria. The indicators of unqualified secondary water supply were mainly free residual chlorine and total coliform bacteria. Conclusion In order to effectively improve the sanitary status of water quality, the water making process should be improved. The water quality monitoring in Feng and dry season should be strengthened. The old pipe network and secondary water supply system should be rebuilt. The secondary water supply tank should be cleaned, disinfected and maintained regularly.