中山县位于珠江三角洲南部,约有三分之二的生产大队是沙田和经济作物地区,地下腐植质多,浅层地下水不能饮用,地面河网交错,水源丰富,但水中浮悬物多,混浊度高,常受田水、生活污水的污染。夏秋多雨季节,污染情况尤为严重。农村居民又有饮生水的不 About two-thirds of the production brigades in Zhongshan are located in Sha Tin and the cash crops. There are many underground hummocks, shallow groundwater can not be consumed, ground river networks are staggered, and there are abundant water resources. However, there are many floating and floating objects in the water High degree, often affected by Tian water, sewage pollution. Summer and autumn rainy season, the pollution situation is particularly serious. Rural residents do not drink water again