Earnhart Hill Regional WSD WWTP - Circleville, Ohio Wastewater Treatment Plant

Earnhart Hill Regional WSD WWTP is a wastewater treatment facility located near Circleville in Pickaway County, Ohio. The plant serves a population of approximately 1,149 people and operates as part of the regional water and sewer district infrastructure. It is situated inland, away from coastal areas, and treats wastewater from the surrounding community. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater facilities. With a designed capacity of 567.81 m³/day and an average discharge volume of 378.54 m³/day, the plant operates below its capacity, indicating room for future growth. The facility is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The treated effluent is discharged into a local receiving water body, likely a tributary of the Scioto River or the Ohio River basin. The plant's operations help protect downstream aquatic ecosystems and support the overall health of the Ohio River watershed, which ultimately drains into the Mississippi River and the Gulf of Mexico.

The plant discharges into a local waterway that flows into the Scioto River, a major tributary of the Ohio River. The Ohio River basin supports diverse aquatic life and provides drinking water for millions. The plant's secondary treatment reduces organic pollutants and suspended solids, helping to maintain water quality in the downstream ecosystem, which includes important fish habitats and recreational areas.