CSD Water Service Co., Ltd. provides water services for small and medium-sized cities, industrial parks, and industrial customers in China. The company offers municipal wastewater treatment, sponge cities construction, and black and odorous water bodies' treatment services; handles sudden and potential surface water pollution accidents; and provides emergency services comprising rapid diagnosis of pollutants, traceability and control schemes of pollution sources, emergency expert group diagnostic services, water and sediment emergency services, and emergency safety reports. It also provides industrial park water environment management services, which include consulting services, sewage treatment plant operation services, and park environmental management services; and industrial enterprise sewage treatment services, as well as sludge treatment and disposal services. CSD Water Service Co., Ltd. is headquartered in Beijing, China.