BRITTON LAGOONS Wastewater Treatment Plant, Marshall County, South Dakota

BRITTON LAGOONS is a wastewater treatment facility located in Miller Township, Marshall County, South Dakota, United States. The plant serves a small community of approximately 1,394 residents, providing secondary treatment to manage municipal wastewater. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. With a designed capacity of 1,135.62 million gallons per year and an actual discharge volume of 681.37 million gallons per year, the facility operates well within its capacity. As a lagoon-based system, it relies on natural biological processes to treat wastewater before discharge. The treated effluent is discharged into local water bodies that eventually drain into the James River basin, part of the larger Missouri River watershed. This region supports agricultural activities and provides habitat for diverse aquatic species. Proper treatment helps protect downstream water quality and ecosystem health.

The plant discharges into local streams that flow into the James River, a tributary of the Missouri River. This watershed supports agricultural irrigation and provides habitat for fish and waterfowl. The Missouri River eventually drains into the Mississippi River and the Gulf of Mexico, making nutrient management important for preventing downstream eutrophication.