You on Baidu map search, not all. According to the number I know of the 1st, 2nd, 3rd, 4th, 5th sewage treatment plant.
The first sewage treatment plant: Dengjiacun sewage treatment plant, in the West Second Ring Road Daxing Interchange to the west more than 2 kilometers north of the road.
The second wastewater treatment plant: Beishiqiao Wastewater Treatment Plant, 1 kilometer east south of the Shiqiao Interchange on the West Third Ring Road.
The third sewage treatment plant: the East Third Ring Road, south of the village of Nanniusi, less than 1 kilometer west of Tongyuan Road, north.
The fourth sewage treatment plant: North Third Ring Road, northwest corner of Zhu Hong Road Interchange.
The fifth wastewater treatment plant: North Third Ring Road, 600 meters west of the Ba River, 1 kilometer north of Xingwang Road, east of the road.