248 plants indexed. Showing 48 matching current filters.
Port Angeles WWTP serves 19,080 people in Washington, USA. Located near the Strait of Juan de Fuca, it operates under the US Clean Water Act with NPDES permitting.
Gig Harbor STP serves approximately 14,947 residents in Washington, USA. The plant discharges treated wastewater into the Puget Sound watershed, supporting local water quality and marine ecosystem health.
Chambers Creek wastewater treatment plant serves University Place, Washington, a large agglomeration of over 134,000 people. The facility is located within 50 km of the coast and discharges into the Puget Sound watershed.
Big Gulch WWTP serves Mukilteo, Washington, treating wastewater for approximately 27,656 residents. The plant operates under U.S. EPA and Washington State regulations, discharging treated effluent into the Puget Sound ecosystem.
LOTT Budd Inlet Treatment Plant serves Olympia, Washington, treating wastewater for over 62,000 people. The plant discharges into Budd Inlet, part of the Puget Sound estuary.
Whidbey NavalAir Station Oak Harbor is a wastewater treatment plant in Island County, Washington, serving approximately 7,500 people. The facility operates under U.S. EPA NPDES regulations for municipal wastewater.
Oak Harbor STP serves 24,200 people in Oak Harbor, Washington. The plant is located within 50 km of the coast and discharges into the Salish Sea via local waterways.
Mount Vernon Treatment serves approximately 31,940 people in Mount Vernon, Washington. The plant is located within 50 km of the coast and discharges into the Skagit River system, which flows into Puget Sound.
West Point WWTP in Seattle, Washington, serves over 1.3 million people. It is a major coastal treatment plant discharging into Puget Sound, operating under the US Clean Water Act.
King County South Treatment Plant in Renton, Washington, serves approximately 787,000 people. It is a major regional facility within 50 km of the Pacific coast, operating under the US Clean Water Act.
Marysville Lagoon serves approximately 60,660 people in Marysville, Washington. The plant operates under the US Clean Water Act and EPA NPDES permitting framework.
The Lynnwood Treatment System in Edmonds, Washington serves approximately 35,860 people. It is located within 50 km of the coast and discharges into the local watershed.
Lake Stevens STP serves approximately 28,210 people in Snohomish County, Washington. The plant operates under the U.S. Clean Water Act and discharges treated wastewater into the local watershed.
LAKOTA STP serves approximately 50,050 people in Federal Way, Washington. The plant is located near the coast and discharges into the Puget Sound watershed.
CENT KITSAP REG STP is a municipal wastewater treatment plant serving approximately 44,476 people in Brownsville, Washington. It operates under the US Clean Water Act framework with NPDES permitting.
Ilwaco Wastewater Treatment Plant serves approximately 8,100 residents in Ilwaco, Washington. It is located within 50 km of the Pacific coast, discharging treated effluent into the Columbia River estuary.
Hoquiam Wastewater Treatment Plant serves 8,650 people in Hoquiam, Washington. Located within 50 km of the coast, it discharges into Grays Harbor estuary on the Pacific coast.
Friday Harbor STP serves 2,680 residents in Friday Harbor, Washington. The plant discharges treated wastewater into the surrounding marine environment of the Salish Sea.
Everett WWTP serves approximately 149,000 people in Washington, USA. The facility is located near the coast and discharges into the Puget Sound ecosystem.
Edmonds STP serves approximately 73,790 residents in Edmonds, Washington. The plant is located within 50 km of the coast and discharges treated wastewater into the Puget Sound ecosystem.
UtilityRadar indexes 248 wastewater treatment plants in Washington, with treatment level, capacity, operator and discharge data on each record.
Among the plants on this page, the most-referenced operator is King County Wastewater Treatment Division. UtilityRadar's records show 1 plant linked to this operator.
Among the indexed plants, PORT ANGELES WWTP has the highest designed capacity at 1 m3/day.