Overview
ST THOMAS LAGOON is a secondary wastewater treatment plant serving 331 people in St. Thomas, North Dakota. It discharges 113.56 million gallons per year into local waterways.
ST THOMAS LAGOON is a municipal wastewater treatment facility located in St. Thomas, Pembina County, North Dakota. Serving a small population of 331 residents, the plant provides secondary treatment to meet state and federal standards for wastewater discharge. The plant has a designed capacity of 151.42 million gallons per year and currently treats 113.56 million gallons annually. As a secondary treatment facility, it uses biological processes to remove organic matter and suspended solids, complying with the U.S. Clean Water Act requirements for municipal wastewater treatment. The treated effluent is discharged into local surface waters that drain into the Red River Basin, ultimately reaching Lake Winnipeg in Canada. The plant plays a key role in protecting downstream water quality in this agriculturally intensive region of the northern Great Plains.
Environmental context
The plant discharges into tributaries of the Red River, which flows north into Lake Winnipeg. This watershed supports diverse aquatic life and is an important migratory corridor for waterfowl. The region's flat terrain and cold winters require careful management to prevent nutrient loading and maintain ecological balance in downstream water bodies.
Frequently asked questions
ST THOMAS LAGOON is located at 229 3rd Avenue in St. Thomas, Pembina County, North Dakota, United States.
The plant serves a population of 331 residents in the St. Thomas area.
The plant discharges treated effluent into local waterways that drain into the Red River Basin, ultimately reaching Lake Winnipeg.
As a U.S. municipal wastewater plant, it operates under the Clean Water Act and is regulated by the North Dakota Department of Environmental Quality through an NPDES permit.
For small communities, secondary treatment is standard, using lagoons or activated sludge systems to meet EPA effluent guidelines for BOD and TSS.
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