Twin Lakes Village S_T Facility - Secondary Wastewater Treatment in Kootenai County, Idaho

Twin Lakes Village S_T Facility is a municipal wastewater treatment plant located in Kootenai County, Idaho, United States. The plant serves a small community of about 1,038 residents, reflecting its role in managing local domestic wastewater in a rural or suburban setting. The facility provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for municipal plants. Secondary treatment typically involves biological processes to remove organic matter and suspended solids. The plant has a designed capacity of 378.54 megaliters per year, with an actual discharge volume of 113.56 megaliters, indicating it operates well below capacity. The treated effluent is discharged into local waterways that ultimately drain into the Spokane River basin and then to the Columbia River, which flows to the Pacific Ocean. The plant's operations help protect downstream water quality and aquatic habitats in this inland watershed.

The plant discharges into tributaries of the Spokane River, which flows into the Columbia River, a major Pacific Northwest waterway. The Columbia River supports diverse fish species, including salmon and steelhead, and is an important ecological and economic resource. The plant's secondary treatment helps reduce nutrient and pollutant loads, safeguarding aquatic life in the downstream river system.