Marion WWTP and Sewer System - Marion County, Ohio Wastewater Treatment

Marion WWTP and Sewer System is a municipal wastewater treatment facility located in Marion County, Ohio, United States. The plant serves a population of approximately 35,660 residents in the Marion area, classifying it as a medium-sized agglomeration under typical US regulatory frameworks. As a US facility, the plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, established by the Clean Water Act. The plant's design and operation are subject to state and federal oversight to ensure compliance with water quality standards. The plant discharges treated effluent into local waterways within the Scioto River basin, which ultimately drains to the Ohio River and then the Mississippi River system. This watershed supports diverse aquatic life and provides drinking water for downstream communities. Proper treatment at this facility helps protect the ecological health of these receiving waters.

The plant discharges into the Scioto River basin, a tributary of the Ohio River, which flows into the Mississippi River and eventually the Gulf of Mexico. This watershed supports diverse aquatic species and provides critical habitat for migratory fish. The plant's operations are important for maintaining water quality in this ecologically significant river system.