Eau Claire WWTP - Wastewater Treatment Plant in Eau Claire, Wisconsin

Eau Claire WWTP is a municipal wastewater treatment facility located in Eau Claire, Wisconsin, serving a population of about 73,694. The plant is situated along the Chippewa River, which flows through the city and ultimately joins the Mississippi River. As a medium-to-large agglomeration, the facility operates under the U. S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges into surface waters. Under the Clean Water Act, plants of this scale are expected to provide at least secondary treatment, which typically involves biological processes to remove organic matter and suspended solids. The regulatory framework ensures that effluent standards are met to protect water quality. The plant's discharge enters the Chippewa River, a major tributary of the Upper Mississippi River. This river system supports diverse aquatic life, including fish species such as walleye and smallmouth bass, and provides habitat for migratory birds. The downstream environment includes the Mississippi River, which is a critical waterway for commerce and ecology in the central United States.

Eau Claire WWTP discharges into the Chippewa River, which flows southwest to join the Mississippi River near Lake Pepin. The Chippewa River watershed is part of the Upper Mississippi River Basin, an ecologically significant region that supports diverse fish and wildlife, including several species of freshwater mussels and migratory waterfowl. The river's health is vital for downstream communities and ecosystems, including the Mississippi River's extensive floodplain forests and wetlands.