济南市居民小区饮用净水供应状况调查

Survey on the conditions of purified drinking water supply in communities,Jinan city

目的为了解济南市居民小区饮用净水卫生状况,为保障饮水安全和强化卫生管理措施提供依据。方法随机调查济南市辖区内部分居民小区自助售水机生产和管理单位的设备维护和管理制度执行情况,并现场采集自助售水机内水样进行检测,对检测结果进行评价。结果饮用净水供应单位在自助售水机的设备维护与管理制度执行方面存在诸多问题;饮用净水检测合格率为71.17%,市政管网水合格率为61.96%(P>0.05)。检测结果的平均值比较分析,饮用净水的pH和菌落总数显著高于管网水(P<0.01),饮用净水的浑浊度、总硬度、溶解性总固体、耗氧量、氯化物、硫酸盐、铁、锰、氟化物、硝酸盐等10项指标显著低于管网水(P<0.01)。结论饮用净水并不显著优于市政管网水,尤其是微生物指标。

Objective To understand the hygienic conditions of purified drinking water supply in communities,Jinan city,so as to provide scientific basis for ensuring safety of drinking water and strengthening hygienic management measures.Methods A random survey was conducted on the conditions of equipment maintenance and system management in production and management units of self-service water dispensers in some residential areas of Jinan city.Water samples were collected from the self-service water dispensers to evaluate the testing results. Results There were many problems in the equipment maintenance and system management in drinking water supply units.The qualified rate of the purified drinking water testing was 71.17%,the qualified rate of the urban pipe-network was 61.96%,without significant differences（P 〉0.05）.The comparative analysis on the mean values of testing results showed that the PH value and the total number of colonies of the purified drinking water were significantly higher those of the water from the urban pipe-network（P 〈0.01）.The indicators of turbidity,total hardness,total dissolved solids,oxygen consumption,chlorides,sulphates,iron,manganese,fluorides,nitrates of the purified drinking water were significantly lower than those of the water from the urban pipe-network（P 〈0.01）. Conclusion The purified drinking water is not superior to the water from urban pipenetwork,especially the microbiological indicators.