26,154 plants indexed worldwide.
Plants where treatment level information is not publicly available.
Westside Treatment Facility serves Vancouver, Washington, treating wastewater for approximately 96,426 residents. The plant operates under the U. S. Clean Water Act's NPDES permit program.
Toppenish Treatment serves approximately 6,888 people in Yakima County, Washington. The plant operates under the US Clean Water Act, managing wastewater for the local community.
TACOMA 3 STP NORTH is a municipal wastewater treatment plant serving approximately 55,050 people in Tacoma, Washington. Located within 50 km of the coast, it discharges into the Puget Sound ecosystem.
TACOMA CENTRAL STP 1 serves Tacoma, Washington, treating wastewater for approximately 218,000 people. The plant discharges into the Puget Sound, a vital marine ecosystem in the Pacific Northwest.
Sumner STP is a municipal wastewater treatment plant serving approximately 26,950 people in Sumner, Washington. The facility operates under U.S. EPA and Washington State regulations.
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.
Spokane Riverside Park POTW is a major wastewater treatment plant serving Spokane, Washington. It treats wastewater for over 360,000 people, discharging into the Spokane River under the US Clean Water Act.
Salmon Creek STP 1 in Burien, Washington serves over 27,000 people. The plant operates under the U.S. Clean Water Act, with discharge likely into the Puget Sound basin.
Miller Creek STP serves Normandy Park, Washington, treating wastewater for over 31,000 residents. The plant is located near the coast and discharges into the Puget Sound watershed.
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.