2009～2010年梧州市郊区农村生活饮用水卫生监测结果分析

目的为了解梧州市郊区农村饮用水的水质动态变化及影响因素。方法根据市郊区农村饮用水的类型、供水方式的不同设置分散式供水监测点,随机抽取利用国债资金建设并竣工的农村饮水安全工程作为集中式供水监测点。2009年设置的集中式供水监测点分别为13个、分散式供水监测点均为15个,2010年在2009年基础上,集中式供水点增加到20个,分散式供水点仍为15个。于2009、2010年分别于3月和8月对水样进行采集、检测、评价。结果 2009年和2010年的水样总体合格率分别为35.37%、22.73%,不同年度的水样合格率间差异无统计学意义(P﹥0.05)。2009～2010年集中式供水出厂水、末梢水和分散式供水的水质合格率间差异无统计学意义(P﹥0.05)。水质单项指标合格率较低的是:总大肠菌群(35.94%)、耐热大肠菌群(39.06%)、菌落总数(75%)、浑浊度(69.27%)、肉眼可见物(92.71%)、pH(93.75%)。其他化学指标和毒理学指标的合格率均在95%以上。结论梧州市农村生活饮用水水处理方式简单,微生物污染是影响梧州市郊区农村生活饮用水水质合格的重要因素。

Investigation of drinking water quality in rural areas in Wuzhou suburbs in 2009-2010

OBJECTIVE To understand the dynamic changes and contributing factors of drinking water in the rural areas in Wuzhou.METHODS According to the types of drinking water and the basic condition of the water supply in rural areas,28 and 35 water sources were randomly selected in 2009 and 2010.In March and August,the drinking water samples were collected,analyzed and assessed according to the standard protocol of drinking water quality test.RESULTS The eligible rate of drinking water in 2009 and 2010 wrer 35.37% and 22.73% respectively.Among all the monitoring indexes,the bacteria index ranked the lowest in terms of eligible rate,ranging from 35.94% to 75%.CONCLUSION The bacteria contamination is a main influencing factor in safety of the drinking water in rural areas.