临沂市改水效果及水源卫生防护状况调查

目的 了解临沂市改水效果及水源的卫生防护状况。方法 对临沂市改水前后水源的卫生防护状况进行了调查，并对自来水水质进行了监测。结果 与改水前比较，水源的卫生防护状况有很大改善；改水后水源水、出厂水、末梢水水质合格率分别为58．33％、67．80％、51．85％。均比改水前明显提高（P＜0．05）。改水后水质的主要超标项目为浑浊度，游度余氯、菌落总数和大肠菌群。结论 改水质自来水水质及水源及的卫生防护状况明显改善，水质主要受生活性污染，应加强对水源的卫生防护。

SURVEYS ON THE EFFECT OF WATER IMPROVEMENT AND THE SANITARY PROTECTION OF WATER SOURCES IN LINYI CITY

Objective To explore the effect of water improvement and the sanitary protection of water sources in Linyi City.Methods Surverys were made on the sanitary protection of water sources after the water improvement project in Linyi City and meanwhile the quality of tap water was monitored.Results The sanitary protection of water sources was greatly strengthened after the water improvement project.It was discovered that the qualification rates of the source water,finished water and the waste of distribution network accounted for 58.33%,67.8% and 51.85% respectively,all higher than those before the water improvement project (P<0.01). The main over-standard items of the improved water were turbidity,free residual chlorine,total bacterial counts and total coli-groups.Conclusion The tap water quality and sanitary protection of water sources were greatly improved after the water improvement project. The water quality were found mainly affected by domestic sewage and it is necessary to strengthen the sanitary protection of water sources.