Wasser Hannover GmbH was founded in 2012 as a wholly-owned subsidiary of Wasser Hannover e.V., which was established in 2002 with the goal of providing consulting services for international projects, leveraging the expertise of Wasser Hannover e.V. members. In March 2023, the company’s shares were acquired by the management team of Wasser Hannover GmbH, and the company continues to collaborate with the partners of Wasser Hannover e.V. as before.

In 2006, through the EU AsiaProEco Project, Wasser Hannover entered the Chinese water industry market. Currently, Wasser Hannover GmbH operates three offices in the cities of Hefei, Changsha, and Changde in China. In October 2023, a wholly-owned subsidiary was established in China: Wasser Hannover Design (Changde) Ltd.

Through years of collaboration in China, Wasser Hannover has successfully implemented more than 90 best-practice projects across over 15 cities. It has introduced the concept of the sponge city and has played a significant role in the development of sponge cities in China.