The Southeast Water Pollution Control Plant, also called the Southeast Treatment Plant, is a wastewater treatment plant operated by the San Francisco Public Utilities Commission, in San Francisco, California, United States. It is located in the southeastern portion of the city in the Bayview-Hunters Point neighborhood.
Southeast is the city's primary treatment plant handling about 80% of the city's wastewater from the eastern two-thirds of the city's residents. The maximum treatment plant capacity is per day, with the average daily dry weather flow of . The facility discharges treated water about into San Francisco Bay. Constructed in 1952, the facility is planned to be updated with new digesters by the mid-2020s.