Tolley Lagoon Wastewater Treatment Plant, Renville County, North Dakota

Tolley Lagoon is a municipal wastewater treatment facility located in Renville County, North Dakota, serving a small population of 47 residents. The plant is situated in a rural area of the state, providing essential sanitation services to the local community. The facility employs secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater plants. With a designed capacity of 37.85 cubic meters and a discharge volume matching that figure, the plant operates at full capacity. As a small-scale lagoon system, it likely uses natural biological processes to treat wastewater before discharge. The treated effluent is released into local waterways that drain into the Souris River basin, eventually reaching the Hudson Bay via the Nelson River system. The plant's operation helps protect downstream water quality in this agriculturally important region of North Dakota.

The plant discharges into local streams that are part of the Souris River watershed, which flows north into Canada and ultimately drains into Hudson Bay. This region supports diverse aquatic life and is important for migratory waterfowl. The secondary treatment ensures that nutrient and pathogen levels are reduced before discharge, helping to maintain the ecological health of downstream water bodies.