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目的全面了解某市市政供水水质状况,为促进供水卫生安全保障提供依据。方法以正常供水的市政水厂为监测对象,进行连续4年的国标全项目水质监测,按不同的年份、水源类型、水期、供水规模、设施水平、消毒工艺整理监测数据并分析。结果出厂水4年总合格率90.18%,2013年合格率最高,各影响因素合格率情况:河流水源(93.33%)、大规模(97.73%)、中等设施水平(100.00%)、液氯消毒(95.00%)的水厂有较高合格率。12项指标出现不合格:浑浊度、肉眼可见物、铝、氯酸盐、pH、铊、亚氯酸盐、三卤甲烷、二氯乙酸、游离余氯、总氯、氨氮。常规项目和非常规项目不合格项次分别占80.77%和19.23%。结论该市市政供水基本水质基本达标,水源类型、供水规模、供水设施水平、消毒工艺是水质达标情况的重要影响因素。
Objective To understand the status of municipal water supply in a city in order to provide the basis for promoting the health and safety of water supply. Methods The municipal waterworks with normal water supply were used as the monitoring objects to monitor the water quality of the national standard for four consecutive years. The monitoring data were sorted and analyzed according to different years, types of water sources, water period, water supply scale, facility level and disinfection technology. Results The total qualified rate of factory water in 4 years was 90.18%, with the highest passing rate in 2013 and the passing rate of all influencing factors: the water source of rivers (93.33%), large scale (97.73%), medium facility level (100.00%), liquid chlorine disinfection 95.00%) of the water plant has a higher pass rate. 12 indicators of unacceptable: Turbidity, macroscopic, aluminum, chlorate, pH, thallium, chlorite, trihalomethanes, dichloroacetic acid, free residual chlorine, total chlorine, ammonia nitrogen. 80.77% and 19.23% of the nonconforming items of conventional items and unconventional items respectively. Conclusions The basic water quality of municipal water supply is basically up to standard. The type of water source, the scale of water supply, the level of water supply facilities and the disinfection technology are the important influencing factors of water quality compliance.