Philipsburg WWTP - Maxville, Montana Wastewater Treatment Plant

Philipsburg WWTP is a municipal wastewater treatment facility located in Maxville, Montana, within Granite County. The plant serves a small community of around 970 residents, providing essential sanitation services in this rural mountainous region of the western United States. The plant operates at secondary treatment level, which is the standard required by the U.S. Clean Water Act for municipal wastewater treatment. With a designed capacity of 416.39 cubic meters per day and an actual discharge volume of 378.54 cubic meters per day, the facility operates below its capacity, indicating adequate headroom for current demand. Treatment processes are typical for small communities, often involving biological treatment followed by clarification and disinfection. The treated effluent from Philipsburg WWTP is discharged into local waterways that eventually drain into the Clark Fork River basin, a major tributary of the Columbia River system. This watershed supports diverse aquatic life and is important for regional water quality. The plant's location in a sparsely populated area with mountainous terrain means that maintaining treatment effectiveness is crucial for protecting downstream ecosystems.

The plant discharges into the Clark Fork River watershed, which flows through western Montana before joining the Pend Oreille River and ultimately reaching the Columbia River and the Pacific Ocean. This basin supports cold-water fisheries including trout and salmon species, and the area is ecologically sensitive due to its mountainous terrain and seasonal flow variations. Proper wastewater treatment is essential to prevent nutrient loading and maintain water quality in this important regional drainage.