苍梧县农村生活饮用水水质监测结果分析

Analysis on drinking water quality surveillance results in rural areas of Cangwu County

目的了解苍梧县农村生活饮用水水质卫生状况,为苍梧县农村饮水安全工程建设和农村水性疾病的防治提供参考依据。方法采用分层随机抽样方法抽取20个农村生活饮用水监测点,按照GB 5750-2006《生活饮用水标准检验方法》的要求对水样感官性状和一般化学指标、毒理学指标、细菌学指标进行检测,并按照GB 5749-2006《生活饮用水卫生标准》对水样进行评价。结果 2013年苍梧县农村生活饮用水的一般化学指标和所检的毒理学指标符合卫生标准,但水样感官性状和细菌学指标均不符合卫生标准,其中超标率排名前5位的分别是色度、浑浊度、菌落总数、总大肠菌群、耐热大肠菌群。结论苍梧县农村生活饮用水水质存在供水混凝沉淀、消毒处理不到位现象,水质浑浊和微生物污染是影响农村地区生活饮用水水质的主要因素。应对水质进行有效净化消毒,防止介水传染病的发生与流行,确保农村生活饮用水的卫生安全。

Objective The purpose of the study is to understand the rural drinking water hygiene condition of Cangwu county,as well as to provide reference for construction of rural safe drinking water projects and prevention of waterborne diseases in rural areas. Methods Stratified random sampling method was applied to select 20 rural drinking water surveillance sites in this thesis.Water Samples are collected and tested according to the Drinking Water Standard Test Method GB / T 5750- 2006,and evaluated by the Drinking Water Sanitary Standard GB / T 5749- 2006. Results The results showed that general chemical indicators and seized toxicological indicators of rural drinking water in 2013 met health standards,except the sensory properties of water samples and bacteriological indicators. Which exceeded the rate of the top five indicators are chromaticity,turbidity,total colonies,total coliforms and heat- resistant coliform bacteria. Conclusion Water coagulation and sedimentation,inadequate disinfection have been existed in rural drinking water of Cangwu,and water turbidity and microbial pollution is the major cause of drinking water quality problem in this rural areas. Thus,adequate measures should be adopted to conduct effective disinfection and clarification,prevent against occurrence and prevalence of water- borne infectious diseases,and ensure the hygiene safety of drinking water in rural areas.