Lambert WWTP - Fox Lake, Montana Wastewater Treatment Plant

Lambert WWTP is a municipal wastewater treatment plant located in Fox Lake, Montana, United States. It serves a small population of approximately 150 residents in this rural community within Richland County. The plant operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal wastewater discharges. The plant provides secondary treatment, a standard biological process that removes biodegradable organic matter and suspended solids. With a designed capacity of 56.78 megaliters and an annual discharge volume of 37.85 megaliters, the facility operates below its capacity. As a small-scale plant, it is subject to EPA National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect water quality. The treated effluent is discharged into local waterways that eventually drain into the Missouri River basin. The plant's location in the Great Plains region means the receiving waters support agricultural and ecological uses. Proper treatment is essential to prevent nutrient pollution and maintain the health of downstream aquatic habitats.

Lambert WWTP discharges into local streams that flow into the Yellowstone River, a major tributary of the Missouri River. The Missouri River ultimately drains into the Mississippi River and the Gulf of Mexico. The surrounding watershed is primarily agricultural, with cattle ranching and crop farming. The plant's secondary treatment helps reduce organic loading and nutrient inputs, protecting downstream water quality and supporting aquatic life in this semi-arid region.