从江县2009年-2012年农村饮用水水质监测结果分析

Analysis of monitoring results of rural drinking water in Congjiang county from 2009 to 2012

目的掌握从江县农村饮用水卫生现状,为提高农村饮水卫生管理水平和政府制定实施农村饮水改善规划提供科学依据。方法对从江县所辖的21个乡镇供水点进行监测,分别于枯水期、丰水期采集出厂水和末梢水进行检测。水样按照《生活饮用水标准检验方法》(GB/T5750-2006)进行检测,检测结果按照《生活饮用水卫生标准》(GB5749-2006)进行评价。结果 2009年-2012年共采集农村饮用水水样308份,合格率为17.53%。枯水期和丰水期水质合格率差异无统计学意义(P>0.05)。水源水和末梢水合格率差异也无统计学意义(P>0.05)。水质不合格主要原因是细菌总数、总大肠菌和群耐热大肠菌群严重超标。结论微生物污染是影响从江县农村生活饮用水水质合格的主要原因。三"氮"污染,高铁、高锰等的水质卫生现状也不容忽视。

Objective To understand the hygienic status of rural drinking water in Congjiang county,so as to provide scientific basis for further improvement of the rural drinking water hygiene management evel and formulating development planing. Methods Treated water samples and tap water samples were collected in dry season and wet season in water supply points of 21 towns of Congjiang to detect the water quality according to ＂Standard examination methods for drinking water＂（ GB / T5750-2006）. Then the detection results were evaluated according to＂Hygienic standard for drinking water＂（ GB5749- 2006）. Results A total of 308 rural drinking water samples were collected from 2009 to 2012,and 54 samples were qualified,accounting for 17. 53%. The qualified rates of rural drinking water had no statistical difference between dry season and wet season（ P〉0. 05）. The same was found between treated water and tap water（P〉0. 05）. The main unqualified factors of rural drinking water were total bacterial count,coliform group and thermotolerant coliform bacterira. Conclusion Microbial contamination is a main influencing factor of the rural drinking water safety in Congjiang county. The three ＂N＂pollution and hygienic status of high ferrous and manganese can not be neglected in rural drinking water management of Congjiang county.