There are many sewage treatment plants in Chongqing. Chongqing Yu Zui (Jiuqu River) Sewage Treatment Plant, Chongqing Zhongliangshan Sewage Treatment Plant, Chongqing Tuzhu Sewage Treatment Plant and Chongqing Yudong Sewage Treatment Plant (designed by Chongqing Three Gorges Water Banan Drainage Co., Ltd., tel. 898 12369).
Chongqing Cai Jia Sewage Treatment Plant and Chongqing Tangjiatuo Sewage Treatment Plant (designed by Chongqing Drainage Co., Ltd.
Tel: 67870787),
Chongqing wellhead sewage treatment plant, Chongqing Lijiatuo sewage treatment plant.