Surrey Lagoon Wastewater Treatment Plant, Surrey, North Dakota

Surrey Lagoon is a municipal wastewater treatment facility located in Surrey, Ward County, North Dakota. The plant serves a small community of approximately 934 residents, providing secondary treatment to manage domestic wastewater. As a lagoon-based system, it relies on natural biological processes to treat effluent before discharge. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal facilities. With a designed capacity of 454.25 cubic meters per day and an average discharge volume of 189.27 cubic meters per day, the plant operates within its capacity. The regulatory framework ensures compliance with National Pollutant Discharge Elimination System (NPDES) permits, which set effluent limits to protect water quality. The treated effluent is discharged into local surface waters that drain into the Souris River basin. This river system flows north into Canada, eventually reaching the Hudson Bay. The plant's operations help safeguard downstream aquatic ecosystems and maintain water quality for recreational and ecological uses in the region.

The plant discharges into the Souris River watershed, which flows northward through North Dakota into Manitoba, Canada, and ultimately drains into Hudson Bay. The receiving waters support diverse aquatic life and are used for irrigation and recreation. The plant's secondary treatment reduces organic pollutants and suspended solids, protecting downstream habitats and maintaining ecological balance in the prairie river system.