Killdeer Lagoon Wastewater Treatment Plant, Killdeer, North Dakota

Killdeer Lagoon is a municipal wastewater treatment facility located in Killdeer, Dunn County, North Dakota. The plant serves a population of approximately 750 residents, providing secondary treatment to manage domestic wastewater from the community. As a lagoon-based system, it relies on natural biological processes to treat wastewater before discharge. Operating under the U.S. Clean Water Act, the plant is subject to National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the North Dakota Department of Environmental Quality. For a small community of this size, secondary treatment is the standard requirement, ensuring that effluent meets federal and state water quality standards before release. The treated effluent from Killdeer Lagoon enters a local drainage that eventually flows into the Missouri River watershed. The Missouri River is a major waterway that supports diverse aquatic life and provides drinking water, irrigation, and recreation for communities downstream. The plant's discharge is regulated to protect these ecological and human uses.

Killdeer Lagoon discharges into a local tributary that drains into the Missouri River, a major river system in the central United States. The Missouri River supports a variety of fish species, including pallid sturgeon and paddlefish, and provides critical habitat for migratory birds. The plant's secondary treatment helps reduce nutrient and organic loads, protecting downstream water quality in this ecologically significant basin.