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1983年8月至翌年10月,按全国统一调查方案对全市现有水源、水质和水性疾病进行了调查,结果分析如下。 一、水源水质调查结果及卫生评价 全市共有8种饮用水源,其中大口井占20.9％,手压井占63.1％,自来水占0.2％,余为泉水、窖水、河水等。120份水样水质分析结果是自来水最好,手压井次之,大口井最差。在不合格的八项指标中,硝酸盐氮、细菌总数和大肠菌群不合格率最高,分别为27.1、93.7和93.7％。饮水人数占全市总人口的36.3％居首的大口井污染严重。每眼井30米半径内平均有粪坑等污染源三处,另
August 1983 to October the following year, according to a unified national survey program of the city’s existing water, water quality and water disease were investigated, the results are as follows. First, the water quality survey results and health evaluation The city a total of 8 kinds of drinking water sources, of which large wells accounted for 20.9%, hand pressure wells accounted for 63.1%, tap water accounted for 0.2%, more than springs, pit water, river water. Water quality analysis of 120 samples of water is the best tap water, followed by hand pressure wells, the worst big well. Of the eight unqualified indicators, the highest rates of nitrate nitrogen, total bacteria and coliform bacteria were 27.1, 93.7 and 93.7%, respectively. The number of drinking water accounts for 36.3% of the total population of the city’s first large mouth well polluting. Each well 30 meters radius of the average cesspit and other sources of pollution three, and the other