通州市乡镇现有自来水厂 3 8家 ,其中 8家水厂取源于地面水 ,经混凝沉淀、过滤、消毒后供水 ,另外 3 0家水厂取源于地下水 ,其中有 17家经消毒后供水。消毒方法有液氯、次氯酸钠发生器和二氧化氯。日平均供水量近 2 0万吨 ,供水人口 75万余人 ,占全市人口的 5 8%。 1989～ 1998 There are currently 38 tap water plants in towns and townships of Tongzhou City, of which 8 are from ground water and are coagulated, filtered and disinfected for water supply. Another 30 water plants are derived from groundwater, of which 17 are disinfected After the water supply. Disinfection methods are liquid chlorine, sodium hypochlorite generator and chlorine dioxide. The daily average water supply is nearly 200,000 tons, and the water supply population is more than 750,000, accounting for 58% of the city’s population. 1989 ~ 1998