248 plants indexed. Showing 135 matching current filters.
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.
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.
Oroville S_T Facility is a municipal wastewater treatment plant serving Oroville, Washington, USA. It serves a population of 2,570 and operates under the US Clean Water Act framework.
OMAK STP serves Omak, Washington, treating wastewater for approximately 4,728 residents. The plant operates under the U.S. Clean Water Act framework, with state-level NPDES permitting ensuring environmental compliance.
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.
North Bend Treatment Plant serves approximately 5,830 residents in North Bend, Washington. It operates under the U.S. Clean Water Act, ensuring treated wastewater meets federal and state standards before discharge.
NEWPORT STP serves Newport, Washington, treating wastewater for approximately 3,040 residents. The plant operates under U.S. EPA and Washington state regulations, discharging into the Pend Oreille River watershed.
UtilityRadar indexes 248 wastewater treatment plants in Washington, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, PUYALLUP STP has the highest designed capacity at 1 m3/day.