Sedro Woolley Treatment Wastewater Plant | Sedro-Woolley, Washington

Sedro Woolley Treatment is a municipal wastewater facility located at 414 Alexander Street in Sedro-Woolley, Washington. Serving a population of about 7,473, the plant is part of the region's infrastructure managed by local authorities. The facility's designed capacity is 1.00 million gallons per day, reflecting its role in handling community wastewater. Under the U.S. Clean Water Act, the plant operates with a National Pollutant Discharge Elimination System (NPDES) permit issued by the Washington State Department of Ecology. For a community of this size, secondary treatment is typically required to meet water quality standards before discharge. The plant's treatment processes are designed to protect public health and the environment. The facility discharges treated effluent into the Skagit River basin, which flows westward to Skagit Bay and the Puget Sound. This watershed supports diverse aquatic life, including salmon runs, and is an important ecological corridor. The plant's operations are critical to maintaining water quality in this sensitive coastal ecosystem.

The plant discharges into the Skagit River basin, which drains into Skagit Bay and ultimately the Puget Sound. This watershed supports critical salmon habitat and diverse aquatic species. The region's coastal environment is sensitive to nutrient loading and pollutants, making effective wastewater treatment essential for maintaining ecosystem health.