Seeley Lake Septic Wastewater Treatment Plant, Montana

Seeley Lake Septic is a municipal wastewater treatment facility located in Seeley Lake, Montana, United States. The plant serves a small community of approximately 780 residents, providing secondary treatment to manage domestic wastewater. As a facility in a rural, inland setting, it plays a key role in protecting local water resources. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater discharges. With a designed capacity of 582.95 volume units and an actual discharge volume of 87.06, the facility has ample capacity to handle current flows. The treatment process ensures that effluent meets federal and state standards before release. The treated effluent is discharged into the local watershed, which ultimately drains into the Clark Fork River basin. This river system supports diverse aquatic life and is an important ecological corridor in western Montana. The plant's operations help maintain water quality in the Seeley Lake area and downstream environments.

The plant discharges into the Seeley Lake area, part of the Clark Fork River watershed. The Clark Fork River flows into Lake Pend Oreille in Idaho and eventually reaches the Columbia River and the Pacific Ocean. The watershed supports native fish species such as westslope cutthroat trout and bull trout, making water quality protection critical for aquatic habitat.