Deer Creek STP - Secondary Wastewater Treatment Plant in Deer Creek, Minnesota

Deer Creek STP is a municipal wastewater treatment facility located in Deer Creek, Minnesota, United States. The plant serves a small population of 321 residents, reflecting the rural character of Otter Tail County. As a secondary treatment plant, it provides biological treatment to remove organic matter and suspended solids, meeting the requirements of the US Clean Water Act for small communities. The plant has a designed capacity of 128.70 units and currently treats an average daily flow of 109.78 units, indicating it operates below its maximum capacity. Under the US EPA's National Pollutant Discharge Elimination System (NPDES), plants of this scale are typically permitted by the Minnesota Pollution Control Agency, which sets effluent limits to protect water quality. The treatment process likely includes activated sludge or trickling filters, common for secondary treatment in small US plants. The treated effluent is discharged into a local water body, likely a tributary of the Otter Tail River, which flows into the Red River of the North and eventually reaches Lake Winnipeg in Canada. The plant plays a key role in protecting downstream aquatic ecosystems by reducing nutrient and pathogen loads, supporting water quality in the Red River Basin.

The plant discharges into a local stream that drains into the Otter Tail River, part of the Red River of the North basin. This river system flows northward into Lake Winnipeg, a large, ecologically sensitive lake that experiences algal blooms from nutrient pollution. The secondary treatment at Deer Creek STP helps reduce phosphorus and nitrogen loads, mitigating eutrophication risks in downstream waters. The surrounding area is primarily agricultural, so the plant also helps control runoff-related contaminants.