South Gate Sewer District Wastewater Treatment Plant, Oakdale Park, Mississippi

South Gate Sewer District is a municipal wastewater treatment plant located in Oakdale Park, Lowndes County, Mississippi, United States. It serves a small population of approximately 1,054 residents, reflecting its role as a community-scale facility in a rural setting. The plant operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment as the minimum standard for municipal wastewater discharges. The plant employs secondary treatment, a biological process that removes organic matter and suspended solids. With a designed capacity of 605.66 thousand gallons per day and an average daily flow of 333.12 thousand gallons, it operates at about 55% capacity, indicating room for future growth. The facility is permitted under the National Pollutant Discharge Elimination System (NPDES), administered by the Mississippi Department of Environmental Quality, ensuring compliance with effluent limits. The treated effluent is discharged into a local receiving water body, which ultimately drains into the Tombigbee River basin. This river system flows southward to the Mobile River and into Mobile Bay, an ecologically important estuary in the Gulf of Mexico. The plant's operations help protect downstream aquatic habitats and support water quality in the region.

The plant discharges into a local waterway that is part of the Tombigbee River basin, which flows into the Mobile River and eventually Mobile Bay on the Gulf Coast. This estuary supports diverse aquatic life, including fish, shellfish, and migratory birds. The secondary treatment process reduces organic pollutants and suspended solids, helping to maintain the ecological health of the downstream river system and coastal waters.