Dawson Lagoon Wastewater Treatment Plant, Dawson, North Dakota

Dawson Lagoon serves the small community of Dawson in Kidder County, North Dakota. As a secondary treatment facility, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant operates under the U.S. Clean Water Act, which requires NPDES permits for all point source discharges, ensuring compliance with water quality standards. The plant's designed capacity of 37.85 units and current discharge volume of 18.93 units indicate it operates below capacity. For small agglomerations like Dawson, lagoon systems are common due to their low operational costs and effectiveness in rural settings. The treatment process typically involves stabilization ponds or aerated lagoons, which rely on natural biological activity. The treated effluent is discharged into local waterways that drain into the Missouri River basin, ultimately reaching the Gulf of Mexico. This region is part of the Prairie Pothole Region, an ecologically sensitive area supporting migratory waterfowl and diverse aquatic life. Proper wastewater treatment is essential to protect these habitats from nutrient pollution and pathogens.

The plant's discharge enters local streams that flow into the Missouri River, a major tributary of the Mississippi River system, which drains into the Gulf of Mexico. The surrounding Prairie Pothole Region is a critical habitat for migratory birds and supports diverse wetland ecosystems. Effective treatment helps prevent nutrient loading and maintains water quality in this sensitive watershed.