Scioto Co West Portsmouth WWTP and Sewers - Advanced Treatment in West Portsmouth, Ohio

Scioto Co West Portsmouth WWTP and Sewers is a municipal wastewater treatment plant located at 124 Slab Run Road in West Portsmouth, Scioto County, Ohio. The facility serves a population of approximately 1,372 residents, classifying it as a small-scale treatment operation within the state's wastewater infrastructure. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the US Clean Water Act. With a designed capacity of 1,703.43 million gallons per year and an actual discharge volume of 609.45 million gallons per year, the facility operates well below its capacity. Under the National Pollutant Discharge Elimination System (NPDES), plants of this scale are typically permitted by the Ohio Environmental Protection Agency to ensure compliance with water quality standards. The treated effluent is discharged into a receiving water body that ultimately drains into the Ohio River watershed, a major tributary of the Mississippi River system. This discharge supports the ecological health of downstream aquatic habitats, including fish and macroinvertebrate communities, while protecting water quality for recreational and drinking water uses.

The plant discharges into a local stream that flows into the Ohio River, which then joins the Mississippi River before reaching the Gulf of Mexico. This watershed supports diverse aquatic life, including several species of freshwater mussels and fish. The advanced treatment level helps minimize nutrient loading and protects downstream ecosystems from eutrophication and other pollution impacts.