Deering Lagoon Wastewater Treatment Plant, McHenry County, North Dakota

Deering Lagoon is a wastewater treatment facility located in McHenry County, North Dakota, United States. It serves a small rural population of 98 residents, reflecting the sparse settlement patterns of the region. The plant operates as a lagoon system, a common treatment approach for small communities in the northern Great Plains. The facility provides secondary treatment, which meets the minimum standard under the U.S. Clean Water Act for municipal wastewater. With a designed capacity of 37.85 million gallons per day and a discharge volume matching that figure, the plant is sized to handle the local wastewater load. As a small system, it is likely regulated under the EPA's General Permits for small communities, ensuring compliance with effluent limits. The treated effluent is discharged into local surface waters, which ultimately drain into the Souris River basin and then into Hudson Bay via Canada. The plant plays a key role in protecting groundwater and surface water quality in this agricultural region, preventing nutrient pollution and safeguarding downstream ecosystems.

The plant discharges into local streams that are part of the Souris River watershed, which flows north into Canada and eventually reaches Hudson Bay. This region is characterized by prairie pothole wetlands and agricultural land, making nutrient management critical to prevent eutrophication. The downstream environment supports diverse aquatic life and migratory birds, highlighting the importance of effective wastewater treatment.