Overview
Letha Sewage Lagoons is a secondary treatment plant serving 128 people in Letha, Idaho. It discharges 37.85 million gallons per year and operates under the US Clean Water Act.
Letha Sewage Lagoons is a municipal wastewater treatment facility located in Letha, Gem County, Idaho. The plant serves a small population of 128 residents, providing secondary treatment to meet local environmental standards. The plant has a designed capacity of 30.28 million gallons and currently discharges approximately 37.85 million gallons annually. As a US facility, it operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The treated effluent is discharged into local waterways that ultimately drain into the Snake River basin. The plant plays a key role in protecting the surrounding agricultural and rural environment from untreated sewage, supporting the health of downstream ecosystems.
Environmental context
The plant discharges into local tributaries of the Snake River, which flows through southern Idaho before joining the Columbia River and reaching the Pacific Ocean. The watershed supports irrigated agriculture and diverse aquatic life, including salmonid species. The plant's secondary treatment helps reduce nutrient and pathogen loads, protecting downstream water quality in this semi-arid region.
Frequently asked questions
Letha Sewage Lagoons is located at 8400 West Idaho Boulevard in Letha, Gem County, Idaho, United States.
The plant serves a small population of 128 residents in the Letha area.
The plant discharges treated effluent into local waterways that flow into the Snake River basin, ultimately reaching the Columbia River and Pacific Ocean.
The plant provides secondary treatment, which is the minimum standard required under the US Clean Water Act for municipal wastewater facilities.
As a US facility, it operates under the National Pollutant Discharge Elimination System (NPDES), which sets discharge limits to protect water quality. For small plants like this, permits typically include monitoring and reporting requirements.
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