Columbus Southerly WWTP and Sewers - Major Wastewater Treatment Plant in Columbus, Ohio

Columbus Southerly WWTP and Sewers is a major wastewater treatment facility located in Columbus, Ohio, serving a population of around 553,000. As one of the largest plants in the region, it plays a critical role in managing municipal wastewater for the state capital and surrounding Franklin County. The plant operates under the U. S. Clean Water Act, which requires secondary treatment for municipal facilities of this scale. The National Pollutant Discharge Elimination System (NPDES) permit program governs its discharge, ensuring compliance with water quality standards set by the Ohio Environmental Protection Agency. For a plant serving over 500,000 people, advanced treatment processes are typically employed to protect receiving waters. The treated effluent is discharged into the Scioto River, a tributary of the Ohio River. The Ohio River flows into the Mississippi River, which drains into the Gulf of Mexico. This downstream connectivity means the plant's performance affects a vast watershed, supporting aquatic life and water quality across multiple states.

The plant discharges into the Scioto River, which flows into the Ohio River and then the Mississippi River before reaching the Gulf of Mexico. This watershed supports diverse aquatic ecosystems, including fish species such as bass and catfish, and provides habitat for migratory birds. The plant's location in an urban area means its effluent quality is crucial for maintaining the health of downstream rivers and the Gulf's marine environment.