Overview
Coolin S_T System is a secondary treatment plant serving 1,185 people in Bonner County, Idaho. It discharges 151.42 megaliters annually into the local watershed.
Coolin S_T System is a wastewater treatment facility located in Bonner County, Idaho, United States. It serves a small population of 1,185 residents, reflecting its role in a rural community. The plant operates under the regulatory framework of the U.S. Clean Water Act, which requires secondary treatment for municipal facilities. The plant provides secondary treatment, a standard level that removes biodegradable organic matter and suspended solids. Its designed capacity is 946.35 megaliters, with an actual discharge volume of 151.42 megaliters, indicating operational headroom. As a U.S. facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Idaho Department of Environmental Quality, ensuring compliance with water quality standards. The treated effluent is discharged into the local watershed, which ultimately drains into the Pend Oreille River and then the Columbia River system. This region supports diverse aquatic life and is part of the larger Columbia Basin, an important ecological and economic resource. The plant's operations help protect downstream water quality in this sensitive inland environment.
Environmental context
The plant discharges into the Pend Oreille River watershed, which flows into the Columbia River and eventually the Pacific Ocean. This inland basin supports cold-water fisheries, including trout and salmon species, and provides habitat for migratory birds. The secondary treatment process reduces nutrient and pollutant loads, helping to maintain water quality in the downstream river system.
Frequently asked questions
Coolin S_T System is located in Bonner County, Idaho, United States, near the community of Coolin on the shores of Priest Lake.
The plant serves a population of 1,185 people, typical of a small rural wastewater system in northern Idaho.
The plant discharges treated effluent into the local watershed, which drains into the Pend Oreille River and ultimately the Columbia River system.
As a U.S. facility, it operates under the Clean Water Act and is regulated by an NPDES permit issued by the Idaho Department of Environmental Quality.
For small communities, secondary treatment is standard, as required by the Clean Water Act, to remove organic matter and suspended solids before discharge.
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