山西运城市区生活饮用水二次污染及对策建议

Secondary Pollution of Domestic Drinking Water in Yuncheng City of Shanxi Province and Countermeasures

实验数据和有关资料表明,生活饮用水的二次污染一直是威胁人类健康的重要问题之一。通过选取山西省运城市市区一些居民小区的生活饮用水,对其总硬度、Pb含量、菌落总数和余氯4项指标进行了测定,了解其二次污染状况。研究表明,市区的生活饮用水确实存在二次污染,其中,硬度和余氯含量基本达标,管道存水比流动的自来水余氯低;Pb含量大部分超标,这与楼层和管道老化有关;管道中存水的菌落总数高,且与水中的余氯含量有关。

Experimental data and relevant data show that the secondary pollution of domestic drinking water has always been one of the important problems threatening human health.Through the selection of domestic drinking water in some residential areas of Yuncheng City,Shanxi Province,the total hardness,Pb content,the total number of bacterial colonies and residual chlorine were measured to understand the secondary pollution.The results show that the secondary pollution does exist in the domestic drinking water in the urban area,among which the hardness and residual chlorine content are basically up to the standard,and the residual chlorine in the pipeline water is lower than that in the flowing tap water;the Pb content is mostly over standard,which is related to the floors and the aging of pipelines;the total number of bacterial colonies in the pipeline water is high,and it is related to the residual chlorine content in the water.