Overview
Twin Falls STP serves approximately 47,389 people in Jerome County, Idaho. The plant operates under the US Clean Water Act, with NPDES permits regulating its discharge to protect local water quality.
Twin Falls STP is a municipal wastewater treatment facility located in Jerome County, Idaho, serving a population of about 47,389. The plant is situated in the Magic Valley region, an area characterized by agricultural activity and the Snake River Plain aquifer. As a medium-sized agglomeration, the plant is subject to US EPA regulations under the Clean Water Act, which requires secondary treatment as a minimum standard. NPDES permits issued by the Idaho Department of Environmental Quality govern discharge limits to protect receiving waters. Plants of this scale typically employ biological treatment followed by disinfection. The plant's treated effluent likely discharges to the Snake River or its tributaries, which flow through southern Idaho and eventually join the Columbia River. This watershed supports diverse aquatic life and is critical for irrigation and recreation in the region. Proper treatment helps maintain water quality in this agriculturally important basin.
Environmental context
The plant's discharge enters the Snake River watershed, which drains into the Columbia River and ultimately the Pacific Ocean. This basin supports important fisheries, including salmon and steelhead, and provides water for extensive agricultural irrigation. Protecting water quality in this semi-arid region is essential for both ecological health and human use.
Frequently asked questions
Twin Falls STP is located in Jerome County, Idaho, United States, serving the Twin Falls area.
The plant serves approximately 47,389 people, classifying it as a medium-sized municipal treatment facility.
The plant discharges treated effluent into the Snake River watershed, which flows through Idaho and into the Columbia River system.
The plant operates under the US Clean Water Act, with NPDES permits issued by the Idaho Department of Environmental Quality that set discharge limits.
Plants of this scale typically use secondary treatment (biological processes) followed by disinfection, as required by EPA standards for municipal wastewater.
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