Dietrich STP - Secondary Wastewater Treatment in Lincoln County, Idaho

Dietrich STP is a municipal wastewater treatment facility located in Lincoln County, Idaho, United States. It serves a small community of 332 residents, reflecting the rural character of the area. The plant is situated in the arid high desert region of southern Idaho, where water resources are carefully managed. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater facilities. Secondary treatment typically involves biological processes to remove organic matter and suspended solids. The plant has a designed capacity of 124.92 million gallons per day and currently processes 75.71 million gallons per day, indicating it operates well below its capacity. The treated effluent from Dietrich STP is discharged into local waterways that ultimately drain into the Snake River basin. The Snake River is a major tributary of the Columbia River, which flows to the Pacific Ocean. The plant plays a key role in protecting the water quality of these downstream water bodies, supporting aquatic life and agricultural uses in the region.

The plant discharges into the Snake River basin, which flows through southern Idaho and into the Columbia River. The Snake River supports diverse aquatic species, including salmon and trout, and is a critical water source for irrigation. The arid climate makes water quality management essential for maintaining ecosystem health and agricultural productivity.