Yunnan Water Investment Co. Ltd. operates as an investment holding company, which engages in the design, development, and operation of wastewater treatment facilities. It operates through the following business segments: Wastewater Treatment, Water Supply, Construction and Equipment Sales, and Others. The Wastewater Treatment segment designs, constructs, and maintains wastewater treatment facilities under arrangements with municipalities. The Water Supply segment develops and operates tap water supply and equipment under concession arrangements with local governments. The Construction and Equipment Sales segment manufactures and trades wastewater equipment and waste disposal facilities. The Others segment provides maintenance services of wastewater treatment and water supply machines. The company was founded on June 21, 2011 and is headquartered in Kunming, China.