CAVALIER LAGOON Wastewater Treatment Plant, Cavalier, North Dakota

CAVALIER LAGOON is a municipal wastewater treatment facility located in Cavalier, North Dakota, serving a population of about 1,300 residents. The plant is situated in Pembina County, near the Canadian border, and operates as a lagoon system providing secondary treatment. With a design capacity of 643,520 gallons per day and an average daily flow of 529,960 gallons, the plant operates at roughly 82% capacity. As a secondary treatment facility, it meets the standard requirements under the U.S. Clean Water Act for municipal wastewater treatment, which mandates secondary treatment for most publicly owned treatment works. The treated effluent is discharged into local waterways that drain into the Red River of the North basin, ultimately flowing north into Lake Winnipeg and Hudson Bay. The plant plays a key role in protecting the region's surface water quality and downstream aquatic ecosystems.

The plant discharges into the Red River of the North basin, which flows northward through Manitoba into Lake Winnipeg. This watershed supports diverse aquatic life and is an important migratory corridor for waterfowl. The region's flat terrain and cold climate influence treatment lagoon performance and seasonal discharge patterns.