OKC South Canadian WWT - Oklahoma City Wastewater Treatment Plant

OKC South Canadian WWT is a municipal wastewater treatment facility located in Oklahoma City, Oklahoma, United States. It serves a population of approximately 29,604 residents in the central business district and surrounding areas. The plant is situated near the South Canadian River, which is a major waterway in the region. As a US facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Oklahoma Department of Environmental Quality. For a plant serving this population size, secondary treatment is typically required, with possible additional nutrient removal depending on the receiving water body's sensitivity. The treated effluent is discharged into the South Canadian River, which flows eastward to join the Canadian River, then the Arkansas River, and eventually the Mississippi River. This watershed supports diverse aquatic life and provides water for agricultural and municipal uses downstream. The plant plays a key role in protecting water quality in the region.

The plant discharges into the South Canadian River, a tributary of the Canadian River, which flows into the Arkansas River and ultimately the Mississippi River. This watershed drains a large portion of the Southern Great Plains and supports diverse aquatic ecosystems, including fish species such as channel catfish and sunfish. The river also provides habitat for migratory birds along the Central Flyway. Protecting water quality in this basin is critical for downstream communities and ecological health.