248 plants indexed. Showing 244 matching current filters.
Wishram Sewer System in Wishram Heights, Washington, serves 184 people with secondary treatment. The plant discharges 113.56 megaliters annually and has a designed capacity of 378.54 megaliters.
Dallesport Treatment is a secondary wastewater plant in Klickitat County, Washington, serving 1,625 people. It discharges 378.54 megaliters annually and operates under U.S. EPA NPDES regulations.
Pacific Beach STP is a secondary treatment plant serving 1,950 people in Pacific Beach, Washington. It discharges 378.54 m³/day of treated wastewater near the Pacific coast.
GRANGER POTW is a secondary treatment plant serving Parker, Washington. It discharges treated wastewater into the Yakima River basin, supporting local water quality.
Grand Coulee STP is a secondary treatment plant serving 1,884 people in Grand Coulee, Washington. It discharges 783.58 thousand cubic meters of treated wastewater annually, operating under the US Clean Water Act.
ELMA STP is a secondary wastewater treatment plant serving 3,540 people in Elma, Washington. It discharges 791.15 million gallons per year into the local watershed.
Eatonville STP is a secondary treatment plant serving 2,775 people in Eatonville, Washington. It discharges treated wastewater into the local watershed, ultimately draining to the Pacific Ocean.
Woodbrook Sewage Treatment Plant in Cowlitz County, Washington, serves 364 people with secondary treatment. The plant discharges 249.84 thousand gallons per day and has a designed capacity of 333.12 thousand gallons per day.
RYDERWOOD STP is a secondary wastewater treatment plant in Ryderwood, Washington, serving a small population of 380. It discharges 378.54 cubic meters of treated wastewater daily.
TOUTLE STP is a secondary treatment plant in Cowlitz County, Washington, serving approximately 1,100 people. It discharges 946.35 cubic meters of treated wastewater daily into the local watershed.
Coupeville STP is a secondary treatment plant serving 2,155 people in Coupeville, Washington. It discharges 757 m³/day of treated wastewater near the coast of Puget Sound.
CONCRETE TREATMENT is a secondary wastewater treatment plant in Concrete, Washington, serving 641 people. It discharges 143.85 million gallons per year into the Skagit River basin.
SEKIU STP is a secondary wastewater treatment plant serving 538 people in Port Angeles, Washington. It discharges 378.54 m³/day of treated effluent near the Strait of Juan de Fuca.
Clallam Bay STP is a secondary treatment plant serving 780 people in Clallam Bay, Washington. It discharges approximately 454 m³/day and is located within 10 km of the Pacific coast.
Forks Treat STP is a secondary wastewater treatment plant in Forks, Washington, serving approximately 3,120 people. It discharges treated effluent into local waterways within the Olympic Peninsula watershed.
Carbonado S T FAC is a secondary wastewater treatment plant in Carbonado, Washington, serving 610 people. It discharges 113.56 megaliters annually and is designed for 378.54 megaliters, operating under U.S. EPA NPDES regulations.
FAIRFIELD STP is a secondary wastewater treatment plant serving Fairfield, Washington, USA. It treats approximately 595 residents with a designed capacity of 427.75 volume units and discharges 302.83 volume units.
GEORGE STP is a secondary wastewater treatment plant serving 690 people in George, Washington. It discharges 113.56 million gallons per year and has a designed capacity of 272.55 million gallons per year.
ASOTIN MUNICIPAL STP serves Vineland, Washington, treating wastewater for 1,255 people with secondary treatment. The plant discharges 355.83 million gallons per year into the local watershed.
North Bay WWTP in Belfair, Washington, serves a population of 4,175. The plant operates under the U.S. Clean Water Act, with a designed capacity of 1.00 million gallons per day.
UtilityRadar indexes 248 wastewater treatment plants in Washington, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, ELMA STP has the highest designed capacity at 1,817 m3/day.