Overview
Zillah Treatment serves approximately 3,000 residents in Zillah, Washington. The plant operates under the US Clean Water Act, with NPDES permits regulating its discharge to protect local water quality.
Zillah Treatment is a municipal wastewater facility located in Zillah, Washington, within Yakima County. The plant serves a population of about 3,000 people, reflecting a small community in the Yakima Valley region of the Pacific Northwest. As a US-based facility, Zillah Treatment operates under the Clean Water Act, administered by the Washington State Department of Ecology. The National Pollutant Discharge Elimination System (NPDES) permit program sets discharge limits to protect water quality. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Yakima River, a tributary of the Columbia River. The Yakima River supports diverse aquatic life, including salmon runs, and is an important resource for irrigation and recreation in the region.
Environmental context
The plant discharges into the Yakima River basin, which flows into the Columbia River and eventually reaches the Pacific Ocean. The Yakima River supports critical habitats for salmon and steelhead, making water quality management essential for downstream ecosystems and regional biodiversity.
Frequently asked questions
Zillah Treatment is located in Zillah, Yakima County, Washington, United States, near the intersection of I-82 and US 12.
The plant serves approximately 3,000 residents in the Zillah area.
The plant discharges treated effluent into the local watershed, which drains into the Yakima River, a tributary of the Columbia River.
As a US facility, Zillah Treatment operates under the Clean Water Act, with NPDES permits issued by the Washington State Department of Ecology.
For small communities of this size, secondary treatment is typically required under the Clean Water Act, often using activated sludge or lagoon systems.
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