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为了解甘肃省农村集中式供水水质的卫生状况,采用整体分层随机抽样方法选择有代表性的集中式供水工程,对近5年来甘肃省5 012个农村地区集中式供水水样进行检测。结果显示,2008—2012年全省农村地区集中式供水水质的综合合格率分别为53.81%,53.28%,59.60%,62.05%和66.50%;微生物指标超标明显,总大肠菌群的超标率达到20.78%;氟化物超标率为1.25%;硫酸盐、总硬度、氯化物、溶解性总固体和硝酸盐的超标率分别为7.91%,7.88%,4.54%,3.36%和2.99%。提示甘肃省农村集中式供水水质合格率较低,但呈现逐年升高的趋势;微生物污染是农村集中式供水水质卫生的首要问题。
In order to know the health status of centralized water supply in rural areas in Gansu Province, a representative centralized water supply project was selected by the stratified stratified random sampling method to test centralized water supply in 5 012 rural areas in Gansu Province in the recent 5 years. The results showed that the overall pass rate of centralized water quality in rural areas in the province from 2008 to 2012 was 53.81%, 53.28%, 59.60%, 62.05% and 66.50%, respectively; the indicators of microorganisms exceeded the standard obviously and the rate of total coliforms exceeded 20.78% %. The exceeding standard rate of fluoride was 1.25%. The over standard rates of sulfate, total hardness, chloride, total dissolved solids and nitrate were 7.91%, 7.88%, 4.54%, 3.36% and 2.99%, respectively. It is suggested that the qualified rate of centralized water supply in rural areas of Gansu province is low, but it shows a trend of increasing year by year. Microbiological pollution is the most important issue in the hygiene of centralized water supply in rural areas.