Hinsdale WWTP - Secondary Treatment Plant in Hinsdale, Montana

Hinsdale WWTP is a municipal wastewater treatment facility located in Hinsdale, Valley County, Montana. It serves a small population of 275 residents, reflecting the rural character of the area. The plant is situated near the Milk River, a tributary of the Missouri River. The plant provides secondary treatment, which is the standard level required under the US Clean Water Act for municipal wastewater. With a designed capacity of 113.56 units and an average discharge volume of 87.06 units, the facility operates within its capacity. As a small agglomeration, it is subject to EPA NPDES permitting, ensuring compliance with effluent limits that protect receiving waters. The treated effluent from Hinsdale WWTP discharges into the Milk River, which flows into the Missouri River and ultimately the Mississippi River system. This watershed supports diverse aquatic life and provides water for irrigation and recreation. The plant's operation helps maintain water quality in this ecologically important region.

The plant discharges into the Milk River, a tributary of the Missouri River, which drains into the Mississippi River and the Gulf of Mexico. The Milk River watershed supports a variety of fish species and provides habitat for migratory birds. The plant's secondary treatment helps reduce nutrient and organic loads, protecting downstream water quality in this semi-arid region.