The Dalanzadgad Wastewater Treatment Plant () is a wastewater treatment plant in Dalanzadgad, ÃÂmnögovi Province, Mongolia.
The plant was constructed in 1971. Over time, the plant has reached its full water treatment and processing capacity. Therefore, later on it was decided that a new treatment plant should be built. The Dalanzadgad New Wastewater Treatment Plant located not far from the existing old plant was constructed in 2019 and opened a year later in 2020.
The plant has a water processing capacity of 1,100 m<sup>2</sup> per day.