Norwalk WWTP and Sewer System | Norwalk, Ohio Wastewater Treatment

Norwalk WWTP and Sewer System is a municipal wastewater treatment facility serving the city of Norwalk, Ohio, in the United States. The plant serves a population of approximately 16,238 residents and is situated in Huron County, near the shores of Lake Erie. As a US facility, 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 community of this size, secondary treatment is typically required, with additional nutrient removal standards applicable in the Lake Erie watershed due to harmful algal bloom concerns. The plant's treated effluent ultimately discharges into the Lake Erie basin, a vital freshwater resource that supports drinking water, recreation, and diverse aquatic life. The Lake Erie watershed is ecologically sensitive, particularly regarding phosphorus loading that contributes to seasonal algal blooms. The plant's location within 50 km of the coast underscores its role in protecting downstream water quality.

The plant discharges into the Lake Erie watershed, part of the Great Lakes system, which drains into the St. Lawrence River and ultimately the Atlantic Ocean. Lake Erie is the shallowest and most biologically productive of the Great Lakes, supporting a rich fishery and providing drinking water for millions. The region faces challenges from nutrient pollution, particularly phosphorus, which drives harmful algal blooms. The plant's operations are critical to mitigating these impacts and maintaining the ecological health of the lake.