Cando Lagoon Wastewater Treatment Plant, Cando, North Dakota

Cando Lagoon is a municipal wastewater treatment facility located in Cando, a small town in Towner County, North Dakota, United States. The plant serves a population of about 1,115 people, reflecting its role as a small-scale community infrastructure. It operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal wastewater discharges to surface waters. The plant provides secondary treatment, a standard biological process that significantly reduces organic matter and suspended solids. With a designed capacity of 340.69 megaliters and an annual discharge volume of 302.83 megaliters, the facility operates at approximately 89% capacity, indicating consistent demand. As a lagoon system, it likely uses natural or aerated ponds for treatment, a common approach in rural areas with available land. The treated effluent is discharged into local waterways, ultimately contributing to the Souris River basin, which flows north into Canada and eventually into Hudson Bay. The plant's operation is critical for protecting downstream water quality in this prairie region, supporting aquatic life and agricultural uses. Its inland location reduces direct marine impact, but proper nutrient management remains important to prevent eutrophication in receiving waters.

The plant discharges into the Souris River basin, which drains northward through North Dakota into Manitoba, Canada, and eventually reaches Hudson Bay. This watershed supports diverse aquatic ecosystems, including fish species such as walleye and northern pike, and provides water for irrigation and livestock. The region's semi-arid climate makes water quality management crucial for sustaining both ecological health and local agricultural activities.