GRAFTON WWTP - Wastewater Treatment Plant in Grafton, Wisconsin, United States

GRAFTON WWTP is a municipal wastewater treatment facility serving the village of Grafton in Ozaukee County, Wisconsin. The plant serves a population of about 11,481 people and is situated near the western shore of Lake Michigan. As a US facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting. For a community of this size, secondary treatment is typically required, and the plant's designed capacity is 1.00 million gallons per day. The plant's treated effluent ultimately discharges into the Lake Michigan basin, which is part of the Great Lakes system. Lake Michigan supports diverse aquatic life and provides drinking water for millions. The plant plays a key role in protecting water quality in this ecologically sensitive freshwater ecosystem.

The plant's discharge enters the Lake Michigan watershed, which drains into the Great Lakes system and eventually the St. Lawrence River. Lake Michigan is a large freshwater lake that supports diverse aquatic species and serves as a critical drinking water source. The plant's operations help protect nearshore water quality and aquatic habitats from nutrient pollution and pathogens.