Wastewater plants in Washington

SALMON CREEK STP 1

Burien, Washington

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.

Not Reported 27,126 Medium

MILLER CREEK STP

Normandy Park, Washington

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.

Not Reported 31,104 Medium

Snoqualmie WWTP

Snoqualmie, Washington

Snoqualmie WWTP serves approximately 10,950 residents in Snoqualmie, Washington. The plant discharges treated wastewater into the local watershed, ultimately draining to Puget Sound.

Not Reported 10,950 Low

SULTAN SEWER SYSTEM

Sultan, Washington

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.

Not Reported 4,655 Low

Snohomish Wastewater System

Snohomish, Washington

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.

Not Reported 9,200 Low

SHELTON STP

Shelton, Washington

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.

Not Reported 9,870 Low

SEQUIM STP

Clallam County, Washington

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.

Not Reported 6,625 Low

SEDRO WOOLLEY TREATMENT

Sedro-Woolley, Washington

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.

Not Reported 7,473 Low

RITZVILLE STP

Ritzville, Washington

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.

Not Reported 1,705 Low

RIDGEFIELD WWTP

Ridgefield, Washington

Ridgefield WWTP serves approximately 5,175 residents in Ridgefield, Washington, USA. The plant treats municipal wastewater and discharges into the local watershed.

Not Reported 5,175 Low

RICHLAND STP

Richland, Washington

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.

Not Reported 49,090 Low

QUINCY INDUSTRIAL STP

Quincy, Washington

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.

Not Reported 3,738 Low

QUINCY DOMESTIC STP

Quincy, Washington

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.

Not Reported 2,864 Low

PUYALLUP STP

Waller, Washington

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.

Not Reported 37,240 Low

PULLMAN STP

Pullman, Washington

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.

Not Reported 46,820 Low

PORT TOWNSEND STP

Port Townsend, Washington

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.

Not Reported 9,180 Medium

Port Orchard WWTP

Parkwood, Washington

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.

Not Reported 11,440 Medium

PORT ANGELES WWTP

Port Angeles, Washington

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.

Not Reported 19,080 Medium

GIG HARBOR STP

Gig Harbor, Washington

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.

Not Reported 14,947 Medium

CHAMBERS CREEK

University Place, Washington

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.

Not Reported 134,089 Medium