Overview
Kidd Island Bay STP is a secondary treatment plant serving 536 people in Kootenai County, Idaho. It discharges 189.27 cubic meters of treated wastewater daily, with a designed capacity of 302.83 cubic meters.
Kidd Island Bay STP is a municipal wastewater treatment facility located in Kootenai County, Idaho, United States. The plant serves a small population of 536 residents, providing secondary treatment to meet state and federal water quality standards. As a secondary treatment plant, it employs biological processes to reduce organic matter and suspended solids. The facility has a designed capacity of 302.83 cubic meters per day and currently treats an average daily flow of 189.27 cubic meters, indicating operational headroom. Under the U.S. Clean Water Act, such plants operate under National Pollutant Discharge Elimination System (NPDES) permits issued by the Idaho Department of Environmental Quality, which set effluent limits to protect receiving waters. The plant's treated effluent is discharged into the local watershed, which ultimately drains to Lake Coeur d'Alene via the Spokane River system. Lake Coeur d'Alene is a large natural lake that supports diverse aquatic life and recreational activities. The plant's secondary treatment helps protect water quality in this sensitive lake ecosystem.
Environmental context
The plant discharges into the Lake Coeur d'Alene watershed, which flows into the Spokane River and eventually to the Columbia River and Pacific Ocean. Lake Coeur d'Alene is a deep, oligotrophic lake that supports native fish species like westslope cutthroat trout and kokanee salmon. The region's forested terrain and seasonal snowmelt influence runoff patterns, making consistent treatment important to prevent nutrient loading and maintain water clarity.
Frequently asked questions
Kidd Island Bay STP is located on Harbor View Drive in Kootenai County, Idaho, United States, near the shores of Lake Coeur d'Alene.
The plant serves a small community of 536 residents in the Kootenai County area.
The plant discharges treated effluent into the local watershed, which drains to Lake Coeur d'Alene and then via the Spokane River to the Columbia River system.
As a U.S. facility, it operates under the Clean Water Act and is subject to an NPDES permit issued by the Idaho Department of Environmental Quality, which sets effluent limits for secondary treatment.
For small communities in Idaho, secondary treatment is standard, using biological processes to reduce organic pollutants and suspended solids before discharge.
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