盘锦地区为退海地带,无可饮用的浅层地下水,居民过去均饮用污染严重的坑塘水,这是该地区人群肠道病发生的主要因素。改水后,居民饮用了深井自来水,水质得到明显改善。为此,我们于1986～1987年进行了改水前后不同水源水质与人群肠道病发生情况的调查。1 内容与方法以饮用深井自来水及供水区人群为调查点;以饮用坑塘水地区的人群为对照点。采用改水、未改水的断面调查和改水前后自身对照 Panjin is a retreated sea area with no drinkable shallow groundwater. In the past, residents used to drink heavily polluted pond water, which is the main factor in the occurrence of intestinal diseases in the area. After changing the water, the residents drank deep well tap water and the quality of water was obviously improved. To this end, we conducted in 1986 ~ 1987 before and after water diversion of water quality and population of intestinal diseases survey. 1 content and methods to drinking water deep tap water and crowd of people as a survey point; drinking pit pond water area as a reference point. The use of water, did not change the water cross-section survey and self-control before and after water changes