Greater Bayfield WWTP - Advanced Wastewater Treatment in Bayfield, Wisconsin

Greater Bayfield WWTP is an advanced wastewater treatment facility located in Bayfield, Wisconsin, serving a population of 986. The plant is situated within 10 km of the Lake Superior coast, making it a coastal facility with direct environmental implications for the Great Lakes ecosystem. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 1,135.62 million gallons and an annual discharge volume of 458.04 million gallons, the facility operates under the regulatory framework of the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges into surface waters. For plants of this scale, advanced treatment is typical in sensitive areas to protect water quality. The treated effluent is discharged into the Lake Superior basin, the largest freshwater lake in the world by surface area. Lake Superior supports diverse aquatic life and provides drinking water for millions. The plant's advanced treatment helps minimize nutrient loading and protects the lake's oligotrophic conditions, which are sensitive to eutrophication.

The plant discharges into the Lake Superior watershed, which ultimately drains into the St. Lawrence River and the Atlantic Ocean. Lake Superior is a critical freshwater resource with low nutrient levels, and any additional nutrient inputs can disrupt its delicate ecological balance. The advanced treatment at this plant helps protect the lake's water quality and the diverse aquatic species that depend on it, including lake trout and whitefish.