Overview
Watertown STP serves the city of Watertown, Minnesota, treating wastewater for approximately 4,440 residents. The plant discharges into local waterways within the Mississippi River basin.
Watertown STP is a municipal wastewater treatment facility located in Watertown, Carver County, Minnesota. The plant serves a population of approximately 4,440 residents, classifying it as a small to medium agglomeration under U.S. regulatory frameworks. As a U.S. facility, Watertown STP operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Minnesota Pollution Control Agency. For plants of this scale, secondary treatment is typically required to meet effluent limits for biochemical oxygen demand and total suspended solids. The treated effluent is discharged into local water bodies that drain into the Mississippi River basin. The Mississippi River downstream supports diverse aquatic life and provides drinking water for numerous communities, making proper treatment essential for water quality and ecosystem health.
Environmental context
Watertown STP discharges into tributaries of the Mississippi River, which flows southward through Minnesota and ultimately reaches the Gulf of Mexico. The receiving waters support aquatic habitats and are part of a larger watershed that provides drinking water and recreational opportunities. Protecting this watershed from nutrient pollution is critical to prevent downstream algal blooms and maintain biodiversity.
Frequently asked questions
Watertown STP is located at 650 Lewis Avenue North, Watertown, Carver County, Minnesota, United States.
Watertown STP serves approximately 4,440 residents in the city of Watertown and surrounding areas.
Watertown STP discharges treated effluent into local waterways that are part of the Mississippi River basin, ultimately flowing to the Gulf of Mexico.
Watertown STP operates under the U.S. Clean Water Act and is regulated through the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Minnesota Pollution Control Agency.
For small to medium agglomerations in the U.S., secondary treatment is typically required, which includes biological processes to reduce organic matter and suspended solids before discharge.
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