CSD Water Service Co., Ltd., together with its subsidiaries, provides environmental services in China. The company offers municipal, industrial, and urban sewage treatment; industrial park and wastewater treatment; environmental governance; industrial park environment; groundwater pollution remediation; water environment management; and sludge treatment and disposal services. It also provides self-activated denitrification filters, multi-effect clarification systems, CSD complexing-coagulation-adsorption defluorination agents, ozone-enhanced biofiltration technologies, drum dynamic aerobic high-temperature fermentation treatment units under the SG-DACT brand, and dry anaerobic fermentation units under the DANAS brand. In addition, the company engages in the sale of sewage treatment agents, environmentally friendly products, and water treatment equipment; research and experimental development; water production and supply; chemical raw materials and products manufacturing; biomass gas production and supply; investment in sewage treatment related businesses; ecological protection and environmental governance; technology development and promotion related to wastewater treatment, sludge treatment, and organic waste treatment and disposal related technologies; and scientific research and technical services. Further, it is involved in management of environmental protection and public facilities; environmental protection engineering contracting; provides environmental protection technical consultation, and technical development and support; sale of building materials, hardware and electrical appliances, and mechanical equipment; import, export of goods and technologies; construction project management; water pollution control; urban landscaping; municipal construction and planning consultation; construction engineering machinery and equipment leasing; and engineering survey and design. CSD Water Service Co., Ltd. was founded in 2009 and is headquartered in Beijing, China.