温州市生活饮用水水质现状调查分析

Quality of drinking water in Wenzhou city:an analysis of the status quo

目的:了解和掌握温州市生活饮用水水质卫生状况,为政府和有关部门采取改善措施提供科学依据。方法:在全市范围分枯、丰水期分别采集集中式供水、小型集中式供水和二次供水共935份,检测水质常规指标,并按照国家《生活饮用水卫生标准》(GB 5749—2006)进行评价。结果:温州市生活饮用水水质合格率为67.27%,其中集中式供水生活饮用水合格率为84.88%,二次供水生活饮用水合格率为94.55%,而小型集中式供水生活饮用水合格率为43.88%;主要不合格指标为二氧化氯、游离余氯、菌落总数、总大肠菌群、浑浊度、pH值、肉眼可见物、铁和氟化物等。结论:生活饮用水水质现状不容乐观,特别是小型集中式供水水质有待改善,以确保饮用水卫生与安全。

Objective To figure out and analyze the sanitary condition of drinking water in Wenzhou, and to provide scientific basis for government and related departments to take measures for improvement. Methods Totally 935 samples were collected of centralized water supply, small centralized water supply and secondary water supply both at dry season and wet season throughout the city, then conventional water quality indicators were detected and evaluated according to ＂Hygienic Standard for Drinking Water＂ （GB 5749-2006）. Results The qualification rate of drinking water in Wenzhou was 67.27% ,of which the qualification rate of centralized water-supply of drinking water was 84.88% ,the qualification rate of secondary water-supply of drinking water was 94.55 % ,and the qualification rate of small centralized watersupply of drinking water was 43.88 %. The main unqualified indexes were chlorine dioxide, free residual chlorine, colony forming unit, total coliform bacteria, turbidity, PH value, visible objects, iron and fluoride. Conclusions The quality of drinking water is not satisfactory. The quality of water from the small centralized water supply needs in particular to be improved to ensure the sanitation and safety of drinking water.