LaCasa Grande Water and Sewer District Wastewater Treatment Plant, Lewis and Clark County, Montana

LaCasa Grande Water and Sewer District is a municipal wastewater treatment plant located in Lewis and Clark County, Montana, United States. It serves a small population of 361 residents, reflecting its role in a rural or suburban community. The plant is situated inland, far from coastal waters, and its operations are part of the broader wastewater infrastructure in the state. The plant provides secondary treatment, a standard level required by the US Clean Water Act for most municipal facilities. Its designed capacity is 136.27 megaliters, and the annual discharge volume is 136.28 megaliters, indicating near-full utilization. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids before discharge. The treated effluent is discharged into a local water body, likely a tributary of the Missouri River basin, which ultimately drains to the Mississippi River and the Gulf of Mexico. The plant's operations help protect downstream water quality and aquatic ecosystems in this inland watershed.

The plant discharges into a local water body within the Missouri River basin, which flows into the Mississippi River and eventually the Gulf of Mexico. This inland watershed supports diverse aquatic life and is important for regional water resources. The secondary treatment helps reduce nutrient and pollutant loads, protecting downstream habitats and water quality.