In which year did the six-water therapy begin?

Liu Shui was treated from September 20th, 2022 to February 20th, 65438.

The three-month investigation includes four stages: mobilization and deployment, self-examination and self-correction, provincial verification, and making rectification plans. The investigation and rectification focused on nine aspects, including problem water treatment, sewage treatment, prevention and control of agricultural non-point source pollution, drinking water safety, flood control and drainage, water saving, prevention and control of pollution in key bays, and rectification and implementation of wading problems.