WAUPUN WWTP - Town of Waupun, Wisconsin Wastewater Treatment Plant

WAUPUN WWTP is a municipal wastewater treatment facility located in the Town of Waupun, Fond du Lac County, Wisconsin. The plant serves a population of approximately 10,718 residents and has a designed capacity of 1.00 million gallons per day, indicating it is sized for a medium-sized community. As a US facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the Wisconsin Department of Natural Resources. For a plant of this scale, secondary treatment is the standard requirement, ensuring removal of organic matter and suspended solids before discharge. The treated effluent is released into local surface waters that drain into the Rock River basin, which flows southward to the Mississippi River and ultimately to the Gulf of Mexico. The plant plays a key role in protecting downstream water quality and aquatic ecosystems in the region.

The plant discharges into tributaries of the Rock River, which flows through southern Wisconsin and northern Illinois before joining the Mississippi River. This watershed supports diverse aquatic life and is an important migratory corridor for fish. The downstream environment includes agricultural and urban areas, making nutrient management critical to prevent eutrophication in the Mississippi River Basin and the Gulf of Mexico.