Caledonia WWTP and Sewer System - Advanced Treatment in Caledonia, Ohio

The Caledonia WWTP and Sewer System is a municipal wastewater treatment facility located at 298 Cemetery Street in Caledonia, Marion County, Ohio. Serving a population of 578, this plant is classified as a small-scale treatment operation within the state's wastewater infrastructure network. The plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. With a designed capacity of 287.69 megaliters and an annual discharge volume of 227.13 megaliters, the facility operates efficiently within its capacity. As a U.S. facility, it is regulated under the Clean Water Act and operates under an NPDES permit issued by the Ohio Environmental Protection Agency, which sets strict effluent limits to protect water quality. The treated effluent from the plant is discharged into a local waterway that ultimately drains into the Scioto River basin, a major tributary of the Ohio River. This downstream connection highlights the plant's role in safeguarding the ecological health of the Scioto River and the broader Ohio River watershed, which supports diverse aquatic life and provides drinking water for millions.

The plant discharges into a local stream that flows into the Scioto River, a key tributary of the Ohio River. The Scioto River basin supports diverse aquatic ecosystems and is an important migratory corridor for fish species. The Ohio River ultimately drains into the Mississippi River and the Gulf of Mexico, making the plant's advanced treatment critical for reducing nutrient and pollutant loads that could contribute to downstream hypoxia zones.