Brightwater Treatment Plant, Maltby, Washington | Major Wastewater Facility Serving Puget Sound

Brightwater Treatment Plant is a major wastewater facility located in Maltby, Washington, serving a population of approximately 597,000 in the Puget Sound region. The plant is part of King County's wastewater system and plays a key role in managing sewage from the Seattle metropolitan area. As a large agglomeration serving over 150,000 people, the plant is expected to provide advanced treatment under the U. S. Clean Water Act and Washington State's water quality standards. The plant's designed capacity is 1.00 (likely in million gallons per day or similar unit), indicating it is sized for significant flows. Treatment processes typically include secondary treatment with nutrient removal to protect sensitive marine waters. The plant discharges treated effluent into the Puget Sound, a major estuary that supports diverse marine life, including salmon, orcas, and shellfish. The facility's operations are critical to maintaining water quality in the sound and protecting downstream ecosystems in the Salish Sea.

Brightwater Treatment Plant discharges into the Puget Sound, a large estuarine system connected to the Salish Sea and ultimately the Pacific Ocean. The sound supports critical habitats for salmon, orcas, and shellfish. The plant's location in a densely populated watershed requires stringent treatment to prevent nutrient pollution and protect marine life.