上海市2009-2012年生活饮用水管网水质监测分析
Monitoring on Drinking Water Quality in Shanghai Water Distribution System, 2009-2012
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摘要:
目的 对上海市生活饮用水管网水质进行监测分析,推进饮用水卫生监督信息化,保障城市饮用水卫生安全。 方法 应用上海市生活饮用水卫生监督预警控制平台,收集2009年5月至2012年12月上海市生活饮用水管网水监测数据并进行统计分析。 结果 2009年5月至2012年12月,平台共连续收集117个管网的水质监测数据5095条,水质合格率为82.7%,各年度合格率分别为72.1%、83.3%、85.5%和85.9%,差异有统计学意义(χ2=87.038, P<0.01)。按照供水水源、供水单位级别等划分的7个不同地区的管网水质差异有统计学意义(χ2=638.014, P<0.01)。共有1087项次指标超标。不同地区的管网水水样中,除总大肠菌群和色度外,消毒剂余量、菌落总数、浑浊度、铁、锰和耗氧量合格率差异均有统计学意义。 结论 上海市生活饮用水管网水水质总体情况良好,信息化建设有利于保障城市饮用水的安全。 Abstract:Objective To monitor the drinking water quality and promote informatization of drinking water health in spection, so as to safeguard drinking water quality in Shanghai. Methods Data of drinking water quality monitoring the municipal supply networks were collected and statistically analyzed by the Shanghai Drinking Water Health Inspection and Warning Control Platform. Results From May 2009 to Dec 2012, 5 095 entries of drinking water quality data in 117 municipal supply networks were collected. The total qualified rate was 82.7%. The qualified rates were 72.1%, 83.3%, 85.5% and 85.9% for each selected year respectively with significant difference (χ2=87.038, P<0.01). According to different water sources and grades of water supply plants, the whole city was divided into seven districts, and the difference in drinking water quality among the seven districts was significant (χ2=638.014, P<0.01). A total of 1 087 indices were not qualified. The differences in the qualified rates of disinfectant residual, total bacterial count, turbidity, iron, manganese, and chemical oxygen demand among 7 districts were significant, except total coliform group and color. Conclusion Drinking water quality in distribution networks in Shanghai is good in general, and informatization construction will safeguard urban drinking water quality.
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