248 plants indexed. Showing 100 matching current filters.
SUMAS COLLECTION is a projected wastewater treatment plant in Sumas, Washington, serving 2,150 people. It will manage municipal wastewater under U.S. EPA and Washington state regulations.
Stevenson STP serves approximately 1,500 residents in Stevenson, Washington. The plant discharges treated wastewater into the Columbia River watershed, supporting downstream water quality in the Pacific Northwest.
Stanwood S_T Facility is a municipal wastewater treatment plant serving approximately 5,445 people in Stanwood, Washington. It operates under the U.S. Clean Water Act framework with a designed capacity of 1.00 million gallons per day.
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.
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.
OTHELLO SEWAGE LAGOONS serves Adams County, Washington, treating wastewater for approximately 7,420 people. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal facilities of this scale.
Orting S_T Facility serves approximately 6,770 residents in Orting, Washington. The plant operates under U.S. Clean Water Act regulations for municipal wastewater treatment.
UtilityRadar indexes 248 wastewater treatment plants in Washington, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, SUMAS COLLECTION has the highest designed capacity at 1 m3/day.