宜宾市翠屏区农村分散式供水水质现况分析

Analysis on the Quality of Separated Rural Water Supply in Cuiping District of Yibin

目的了解宜宾市翠屏区农村分散式供水水质现况,为农村改水工作提供科学依据。方法对宜宾市翠屏区2007—2008年新打红层水井9 612口进行随机采样,采样量不少于3%;对79所学校的自建井进行全面监测分析;结果按照《生活饮用水卫生标准》(GB 5749-2006)进行评价。结果宜宾市翠屏区农村分散式供水合格率仅为22.54%,其中"红层找水项目工程"水样合格率为19.32%,农村学校井水合格率为39.24%,二者差异有统计学意义(P"0.05)。红层找水与学校井水单项指标比较:浑浊度、肉眼可见物、硝酸盐、总大肠菌群差异有统计学意义。结论宜宾市翠屏区农村分散式供水水质合格率较低,农村学校自建井水水质优于"红层找水项目工程"水质,以微生物污染为主,加强饮水消毒是农村分散式供水水质卫生质量控制的关键措施。

Objectives To analyze the hygienic status of water from separated water supply（decentralized water supply） in rural area of Cuiping District and to provide scientific evidence for improving water supply in countryside.Methods Samples of no less than 3% from 9 612 red rock layer wells dug from 2007 to 2008 in Cuiping,and samples of 79 wells in rural schools were analyzed and evaluated according to Standards for Drinking Water Quality（GB 5749-2006）.Results The qualified rate of total separated water supply（decentralized water supply） was only 22.54%.The qualified rate of Red rock layer well（19.32%） was significantly lower than that of rural school well water（39.24%）.The turbidity,visible objects,nitrate and total coliform in rural school well water were better than those in Red rock layer well.Conclusions The qualified rate of separated water supply（decentralized water supply） in rural areas of Cuiping was poor,and the quality of rural school well water was better than the quality of red rock layer well water.The main contaminants were microorganisms.Strengthening water disinfection is the key measure to control the quality of separated water supply（decentralized water supply） in rural area of Cuiping.