Lincoln Lagoon Wastewater Treatment Plant, Lincoln, North Dakota

Lincoln Lagoon is a municipal wastewater treatment facility located in Lincoln, North Dakota, serving a population of approximately 2,145 residents. The plant provides secondary treatment, a standard level for small communities in the United States, ensuring effective removal of organic matter and suspended solids before discharge. The plant has a designed capacity of 757.08 cubic meters per day and currently discharges a similar volume, indicating full utilization. As a US facility, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits, which set effluent limits to protect water quality. The plant's treatment process is typical for small agglomerations, often involving lagoon systems that provide biological treatment through natural processes. The treated effluent is discharged into local waterways that drain into the Missouri River basin. This region is part of the larger Mississippi River watershed, ultimately reaching the Gulf of Mexico. The plant plays a key role in protecting downstream aquatic ecosystems by reducing nutrient and pollutant loads, supporting water quality in the Missouri River and its tributaries.

Lincoln Lagoon discharges into local water bodies that flow into the Missouri River, a major tributary of the Mississippi River system. The Missouri River supports diverse aquatic life and is an important migratory corridor for fish and birds. The plant's secondary treatment helps reduce nutrient pollution, which is critical for preventing eutrophication in downstream lakes and the Gulf of Mexico hypoxic zone.