London WWTP and Sewer System - Madison County, Ohio Wastewater Treatment

The London WWTP and Sewer System is a municipal wastewater treatment facility located in Madison County, Ohio, serving a population of about 12,250. It is situated in the rural agricultural region of central Ohio, where it manages wastewater from the local community. As a US-based plant serving a medium-sized agglomeration, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Ohio Environmental Protection Agency. These permits typically require secondary treatment, which is the standard for plants of this scale. The plant's treated effluent is discharged into local waterways that ultimately drain into the Ohio River basin. This contributes to the protection of downstream aquatic ecosystems and supports water quality in the region.

The plant discharges into tributaries of the Scioto River, which flows into the Ohio River and eventually the Mississippi River. The local watershed supports diverse aquatic life and is important for regional water quality. The agricultural landscape means nutrient management is a key concern for downstream environments.