丹阳市生活饮用水卫生学调查

Hygienic investigation of drinking water in danyang city

对丹阳市２７个乡镇生活饮用水调查结果表明：丹阳市生活饮用水水源主要是浅井水、河水和沟塘水；无论是集中式供水或分散式供水，９０％以上的水源有生活污染源；各指标的超标率以氨氮居首位，其次是耗氧量、浑浊度；丹阳市生活饮用水的有机污染严重，生活饮用水水源的水质最差的是沟塘水，其次是河水，浅井水的水质较好；丹阳市饮用不合格水的人口数占４０．９％。

The drinking water in 27 villages and towns of Danyang city were investigated. The main drinking water sources in Danyang city were shallow well, river and pond; Over 90 percent of water sources were polluted by domestic sewage of either centralized type of water supply or decentralized type of water supply. The unqualified rate of the concentration of ammonia-nitrogen occupied the first place among the items determined,the chemical oxygen demand was the second. The water quality of pond was the worst of all, shallow well was better than river water. The amount of population drinking unqualified water covered 40.9 percent of total population in Danyang city.