Marysville WRF and Sewer System - Municipal Wastewater Treatment in Marysville, Ohio

The Marysville WRF and Sewer System is a municipal wastewater treatment facility located in Marysville, Ohio, serving a population of around 19,282. Situated in Union County, the plant is part of the region's infrastructure for managing domestic wastewater from the community. As a facility in the United States, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Ohio Environmental Protection Agency. For a population of this size, secondary treatment is typically required, with possible additional nutrient removal depending on the receiving water body's sensitivity. The plant's treated effluent is discharged into local streams that flow into the Scioto River, a major tributary of the Ohio River. The Scioto River watershed supports diverse aquatic life and provides drinking water for downstream communities. Proper treatment helps protect water quality in this important regional drainage system.

The plant discharges into tributaries of the Scioto River, which flows south to join the Ohio River near Portsmouth, Ohio. The Scioto River watershed is ecologically significant, supporting fish populations such as smallmouth bass and channel catfish, and providing habitat for freshwater mussels. The Ohio River ultimately drains into the Mississippi River and the Gulf of Mexico, making nutrient management important for preventing downstream hypoxia.