Wibaux WWTP - Secondary Treatment Plant in Wibaux, Montana, USA

Wibaux WWTP is a municipal wastewater treatment facility located in Wibaux, Montana, United States. The plant serves a population of approximately 650 residents, making it a small-scale facility typical of rural communities in the Great Plains region. It is situated in Wibaux County, near the Yellowstone River watershed, which ultimately drains into the Missouri River. The plant provides secondary treatment, which is the standard level required under the US Clean Water Act for municipal wastewater. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 378.54 cubic meters per day and currently discharges an average volume of 246.05 cubic meters per day, indicating operational capacity below design levels. As a US facility, it operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the Montana Department of Environmental Quality, which sets effluent limits to protect receiving waters. The treated effluent from Wibaux WWTP is discharged into a local watercourse that flows into the Yellowstone River, a major tributary of the Missouri River. The Yellowstone River supports diverse aquatic life, including native fish species such as the Yellowstone cutthroat trout. The plant's discharge contributes to the overall water quality in this ecologically important river system, which ultimately drains into the Gulf of Mexico via the Mississippi River.

The plant discharges into a tributary of the Yellowstone River, which flows into the Missouri River and eventually the Mississippi River and Gulf of Mexico. The Yellowstone River basin supports diverse aquatic ecosystems, including native fish populations and migratory birds. The region's semi-arid climate means that maintaining water quality in these rivers is critical for both ecological health and downstream water users.