重庆市万州区二次供水现状及饮用水质调查分析

目的了解三峡库区腹地万州城区二次供水现状及饮用水质存在问题，为加强二次供水卫生管理及卫生行政部门监督执法提供科学依据。方法对2004—2007年万州城区二次供水单位的供水设施及饮用水质进行现场调查和采样，对其相关资料进行收集整理和分析。结果2004—2007年万州城区二次供水检测水样205个，合格160个，合格率78．05％；物业区、宾馆、综合区二次供水水质合格率分别为74．73％、78．46％和83．67％，3者之间水质合格率差异有统计学意义（χ^2=18．25，P〈0．005）；2005与2007年水质合格率差异有统计学意义（χ^=5．13，P〈0．05）。结论万州城区二次供水水质合格率不高，物业区、宾馆二次供水水质合格率还更低，存在安全隐患。

Current Status of Sub-Water Supply Systems and Drinking Water Quality in Wanzhou District,Chongqing Municipality

Objective To learn about the current status of sub-water supply systems and drinking water quality in downtown of Wanzhou and provide scientific evidence for the management and supervision of water supply. Methods Field survey and sampling of sub-water supply systems was conducted during 2004-2007, in which water supply facilities were inspected and water samples were taken. Results A total of 205 water samples from sub-water supply systems were taken, 160 were qualified （78. 05% ）. The qualitied rate was 74. 73% for residential areas, 78.46% for hotels and 83.67% for others, which had statistical significant differences （ χ^2 = 18.25, P 〈 0. 05 ）. The difference on qualitied rates of drinking water in 2005 and in 2007 was statistical significant（ χ^2 = 5. 13, P 〈 0. 05 ）. Conclusion The qualitied rate of the quality of drinking water from sub-water supply systems in downtown of Wanzhou was low, and even lower in residential areas and hotels, which posed potential risk for the people＇s health.