Overview
New Plymouth Sewage Lagoon in Payette County, Idaho, serves 1,538 people with secondary treatment. The plant discharges 454.25 million liters annually and has a designed capacity of 2,271.24 million liters.
New Plymouth Sewage Lagoon is a wastewater treatment facility located in Payette County, Idaho, United States. It serves a population of approximately 1,538 residents, operating as a municipal lagoon system. The plant is situated inland, away from coastal areas, and treats wastewater for the local community. The facility provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater. With a designed capacity of 2,271.24 million liters and an annual discharge volume of 454.25 million liters, the plant operates well below its capacity. Under the National Pollutant Discharge Elimination System (NPDES), plants of this scale are typically permitted to discharge treated effluent into nearby surface waters. The treated effluent from New Plymouth Sewage Lagoon is discharged into local waterways that eventually drain into the Snake River basin. The Snake River flows through southern Idaho and joins the Columbia River, which empties into the Pacific Ocean. The plant's operations help protect downstream aquatic ecosystems and water quality in the region.
Environmental context
The plant discharges into the Snake River basin, a major tributary of the Columbia River system. The Snake River supports diverse aquatic life, including salmon and steelhead trout, and is an important migratory corridor. The plant's secondary treatment reduces organic pollutants and suspended solids, helping maintain water quality in downstream rivers and reservoirs.
Frequently asked questions
New Plymouth Sewage Lagoon is located in Payette County, Idaho, United States, near Northwest 1st Avenue.
The plant serves a population of approximately 1,538 people.
The plant discharges treated effluent into local waterways that drain into the Snake River basin, ultimately reaching the Columbia River and the Pacific Ocean.
The plant provides secondary treatment, which is the standard required by the U.S. Clean Water Act for municipal wastewater facilities.
As a municipal plant in the United States, it operates under the Clean Water Act and is likely permitted through the National Pollutant Discharge Elimination System (NPDES), which sets effluent limits to protect water quality.
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