Sun Prairie Village Wands District Wastewater Treatment Plant, Montana

Sun Prairie Village Wands District is a municipal wastewater treatment plant located in Sun Prairie, Cascade County, Montana, United States. The facility serves a small population of approximately 1,400 residents, reflecting its role in a rural community. The plant operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment as a minimum standard for municipal wastewater facilities. The plant provides secondary treatment, a biological process that removes organic matter and suspended solids. It has a designed capacity of 688.94 volume units and currently discharges 492.10 volume units, indicating operational capacity below its design limit. As a US facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Montana Department of Environmental Quality, ensuring compliance with water quality standards. The treated effluent is discharged into local waterways that ultimately drain into the Missouri River basin. The plant's location in inland Montana means its discharge contributes to the watershed that supports agricultural and ecological systems in the region. Proper treatment helps protect downstream water quality and aquatic habitats.

The plant discharges into the Missouri River watershed, which flows through Montana and into the Mississippi River system before reaching the Gulf of Mexico. The receiving waters support diverse aquatic life and are used for irrigation and recreation. The plant's secondary treatment helps reduce nutrient and pollutant loads, protecting downstream ecosystems in this semi-arid region.