248 plants indexed. Showing 135 matching current filters.
Snoqualmie WWTP serves approximately 10,950 residents in Snoqualmie, Washington. The plant discharges treated wastewater into the local watershed, ultimately draining to Puget Sound.
The Sultan Sewer System serves the town of Sultan, Washington, treating wastewater from approximately 4,655 residents. The plant discharges into the Skykomish River, a tributary of the Snohomish River, which flows into Puget Sound.
Snohomish Wastewater System serves 9,200 people in Snohomish, Washington. The plant operates under U.S. Clean Water Act regulations with a designed capacity of 1.00 million gallons per day.
Shelton STP serves about 9,870 people in Shelton, Washington. The plant is located within 50 km of the coast and discharges into the local watershed.
SEQUIM STP is a wastewater treatment plant in Clallam County, Washington, serving approximately 6,625 people. The plant is located within 50 km of the coast and has a designed capacity of 1.00 million gallons per day.
Sedro Woolley Treatment serves approximately 7,500 residents in Sedro-Woolley, Washington. The plant operates under the U.S. Clean Water Act, discharging treated wastewater to local waterways in the Skagit River basin.
Ritzville STP is a municipal wastewater treatment plant serving approximately 1,705 residents in Ritzville, Washington, USA. It operates under the US Clean Water Act framework.
Ridgefield WWTP serves approximately 5,175 residents in Ridgefield, Washington, USA. The plant treats municipal wastewater and discharges into the local watershed.
Richland STP serves approximately 49,090 residents in Richland, Washington. The plant operates under the U.S. Clean Water Act, which mandates secondary treatment for municipal wastewater facilities.
Quincy Industrial STP serves approximately 3,738 people in Quincy, Washington. The plant operates under the U.S. Clean Water Act, with NPDES permits regulating its discharge to protect local water quality.
Quincy Domestic STP serves approximately 2,864 residents in Quincy, Washington. The plant treats municipal wastewater and discharges into the local watershed, supporting the Columbia River basin.
Puyallup STP serves approximately 37,240 people in Waller, Washington. The plant operates under the U.S. Clean Water Act, with NPDES permits regulating its discharge into the Puyallup River watershed.
Pullman STP serves approximately 46,820 residents in Pullman, Washington. The plant operates under the U.S. Clean Water Act, with NPDES permits regulating its discharge to protect local water quality.
Port Townsend STP serves 9,180 residents in Washington, USA. The plant discharges treated wastewater into the local watershed, supporting environmental health in the Puget Sound region.
Port Orchard WWTP serves Parkwood, Washington, treating wastewater from a population of about 11,440. The plant is located within 50 km of the coast and discharges into the Puget Sound watershed.
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.
Pasco STP serves about 61,000 residents in Pasco, Washington, treating municipal wastewater before discharge. The plant operates under the U.S. Clean Water Act's NPDES permitting program.
Palouse Treatment Facility serves the town of Palouse, Washington, treating wastewater for approximately 1,015 residents. The plant discharges into the local watershed, contributing to the Palouse River basin.
UtilityRadar indexes 248 wastewater treatment plants in Washington, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, SULTAN SEWER SYSTEM has the highest designed capacity at 1 m3/day.