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目的了解苏州市吴江区二次供水水质情况,进而提出相应的解决建议。方法对吴江区的居住小区、大型服务场所、学校、医院等实施二次供水的单位按布点要求抽取二次供水水样,检测水样的色度、浑浊度、臭和味、耗氧量、总大肠菌群、细菌总数、游离余氯、铁、氨氮、亚硝酸盐氮,利用SAS软件对数据进行统计分析。结果吴江区2011—2013年二次供水水质合格率分别为77.00%、51.84%、65.05%,合格率差异有统计学意义(χ2=28.32,P<0.05)。不同类型场所合格率比较,居民住宅二次供水合格率较高。二次供水不合格的项目主要是游离余氯、微生物指标、浑浊度。结论吴江区二次供水水质不容乐观,合格率较低,针对分析出的原因提出全面规范管理的建议。
Objective To understand the water quality of secondary water supply in Wujiang District, Suzhou City, and to propose corresponding solutions. Methods The secondary water supply units in Wujiang District residential quarters, large service venues, schools, hospitals and other secondary water supply units to extract secondary water samples according to the distribution requirements, testing the water samples for color, turbidity, odor and taste, oxygen consumption, Total coliforms, total bacteria, free residual chlorine, iron, ammonia nitrogen, nitrite nitrogen, the use of SAS software for statistical analysis of the data. Results The qualified rates of secondary water supply in Wujiang District from 2011 to 2013 were 77.00%, 51.84% and 65.05%, respectively. There was significant difference in passing rate (χ2 = 28.32, P <0.05). Different types of places pass rate comparison, residential secondary water supply higher pass rate. Secondary water supply failure of the project is mainly free residual chlorine, microbial indicators, turbidity. Conclusion The water quality of secondary water supply in Wujiang District is not optimistic, with a low pass rate. Based on the analysis of the reasons for the proposed comprehensive and standardized management recommendations.