Oriska Lagoon Wastewater Treatment Plant, Oriska, North Dakota

Oriska Lagoon is a wastewater treatment facility located in Oriska, North Dakota, serving a small population of 118 residents. The plant is situated in a rural area of Barnes County, reflecting the community's modest scale. The plant provides secondary treatment, which is the standard level required under the US Clean Water Act for municipal wastewater facilities. With a designed capacity of 75.71 units and a discharge volume matching that figure, the plant operates at full capacity. As a small facility, it is subject to EPA NPDES permitting, typically administered by the state environmental agency. The treated effluent is discharged into local waterways that drain into the Sheyenne River basin, eventually reaching the Red River of the North and ultimately Hudson Bay. The plant plays a key role in protecting local water quality in this agriculturally dominated region of the Great Plains.

The plant discharges into the Sheyenne River watershed, which flows northward into the Red River of the North and eventually into Lake Winnipeg and Hudson Bay. This region supports diverse aquatic life and is part of a major migratory corridor for waterfowl. The secondary treatment helps reduce nutrient loading and organic pollutants, safeguarding downstream ecosystems in this sensitive prairie river system.