对照分析徐州高氟和污染严重地区改水３ 年前和改水后饮水卫生和肠道传染病及其效益情况。结果表明：该地区改水后饮用水源明显改善；取水方式显著改进，方便程度明显提高；水质改善，水质综合合格率远远高于改水前；肠道传染病发病率由０９６ ％ 降至０５８ ％ ，且未见介水性疾病暴发和流行。预测地方性氟中毒发病率将会显著下降。 Comparative analysis of high fluoride and Xuzhou Xuzhou polluting areas water three years ago and after changing the water sanitation and intestinal infectious diseases and their benefits. The results showed that the drinking water source improved significantly after the water was changed in the area; the water intake method was significantly improved and the convenience level was obviously improved; the water quality improved and the comprehensive pass rate of water quality was much higher than that before water diversion; the incidence rate of intestinal infectious disease increased from 096% Down to 0  58%, and no water-borne diseases outbreaks and epidemic. Predict the incidence of endemic fluorosis will be significantly reduced.