CSD Water Service Co., Ltd. provides environmental services in China through itself and its subsidiaries. Its offerings include municipal, industrial, and urban sewage treatment, industrial park wastewater treatment, environmental governance, groundwater pollution remediation, water environment management, and sludge treatment and disposal. The company also supplies treatment technologies and equipment such as self-activated denitrification filters, multi-effect clarification systems, complexing-coagulation-adsorption defluorination agents, ozone-enhanced biofiltration, SG-DACT drum dynamic aerobic high-temperature fermentation units, and DANAS dry anaerobic fermentation units. In addition, it sells sewage treatment agents, environmentally friendly products, and water treatment equipment, and engages in related research, manufacturing, investment, engineering, and technical services. Founded in 2009, it is headquartered in Beijing, China.