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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。
Objective To understand the dynamic changes of drinking water quality and its influencing factors in rural areas of Wuzhou City. Methods According to the types of rural drinking water and the different water supply modes in rural suburbs, decentralized water supply monitoring stations were set up. Rural drinking water safety projects constructed and completed with national debt were randomly selected as centralized water supply monitoring points. In 2009, centralized water supply monitoring points were set at 13 and distributed water supply monitoring points at 15 respectively. From 2010 onwards, the number of centralized water supply points increased to 20 and the number of distributed water supply points remained at 15. In 2009 and 2010, the water samples were collected, tested and evaluated in March and August respectively. Results The overall pass rates of water samples in 2009 and 2010 were 35.37% and 22.73%, respectively. There was no significant difference in the passing rates of water samples in different years (P> 0.05). There was no significant difference in qualified rate of water quality between the centralized water supply and the peripheral water supply in the period from 2009 to 2010 (P> 0.05). The low pass rate of water quality indicators was: total coliform (35.94%), heat-resistant coliform (39.06%), total colony (75%), turbidity (69.27%) and macroscopic (92.71% , PH (93.75%). Other chemical indicators and toxicology indicators pass rate of 95% or more. Conclusion The treatment of rural drinking water in rural areas in Wuzhou is simple and the microbial pollution is an important factor affecting the quality of rural drinking water in rural areas of Wuzhou.