Overview
Granite Falls STP serves approximately 3,370 residents in Granite Falls, Washington. The plant operates under the U.S. Clean Water Act, ensuring treated wastewater meets environmental standards before discharge.
Granite Falls STP is a municipal wastewater treatment facility located in Granite Falls, Washington, serving a population of about 3,370. The plant is situated in Snohomish County and plays a key role in managing local wastewater for this small community. As a U.S. facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Washington State Department of Ecology. For small agglomerations like this, secondary treatment is typically required to reduce organic matter and suspended solids before discharge. The plant's treated effluent is discharged into a local waterway that ultimately drains into the Snohomish River and then into Puget Sound. This connection to the marine environment underscores the importance of effective treatment to protect aquatic life and water quality in the downstream ecosystem.
Environmental context
The plant discharges into a tributary of the Snohomish River, which flows into Puget Sound, a major estuarine system in the Pacific Northwest. This watershed supports diverse aquatic species, including salmon runs, and is ecologically sensitive to nutrient and pollutant inputs. Proper treatment helps maintain water quality for both freshwater and marine habitats.
Frequently asked questions
Granite Falls STP is located at 501 West Wallace Street in Granite Falls, Washington, United States.
The plant serves approximately 3,370 residents in the Granite Falls area.
The plant discharges treated effluent into a local waterway that flows into the Snohomish River, which ultimately reaches Puget Sound.
As a U.S. facility, Granite Falls STP operates under the Clean Water Act and is regulated by an NPDES permit issued by the Washington State Department of Ecology.
For small communities of this size, secondary treatment is standard under the Clean Water Act, which reduces biochemical oxygen demand and suspended solids to protect receiving waters.
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