Hefei Wangtang sewage plant belongs to the government-owned, run by Waterstar Water

Hefei Wangxiaoying sewage plant belongs to the government-owned, the current running unit seems to be a company in Germany

Hefei City, the open area of the sewage plant belongs to the government-owned, the former running unit is Anhui Zhengda Environmental Engineering Limited

Hefei Zhu brick well sewage plant belongs to the National Zhen, running unit is also the National Zhen water

Hefei summary town sewage plant belongs to the government-owned, running unit is Anhui Yatai environment

Hefei Tangxihe sewage plant belongs to the government-owned, running unit earlier Beijing Biyuan water, I am not sure

The above is what I understand