2011—2013年苏州市吴江区二次供水水质监测情况

Secondary water quality monitoring in Wujiang District of Suzhou City from 2011-2013

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 of Suzhou City, and propose appropriate recommendations.[Methods]The water samples were collected from residential area , large service places, schools , hospitals and other units with secondary water supply according to plan. The color, turbidity, odor and taste, oxygen consumption, total coliform, total bacteria, free chlorine, iron, ammonia, nitrite nitrogen were tested. The results were analyzed statistically by SAS software.[Results]The qualified rates of secondary water quality were 77.00%, 51.84%, 65.05% in Wujiang District from 2011-2013, with significant difference （χ2=28.32, was higher than that of other places. The main unqualified P〈0.05）. The qualified rate of water quanlity in residential area items were free chlorine, microbial indicators and turbidity. [Conclusion]The water quality of secondary water supply is not optimistic in Wujiang District, with low qualified rate. Proposals for comprehensive management are put forward to solve the analyzed problem.