248 plants indexed. Showing 184 matching current filters.
Soap Lake STP is a secondary treatment plant serving approximately 1,735 residents in Soap Lake, Washington. It discharges treated wastewater into the local watershed, supporting water quality in the region.
Pomeroy WWTP is a secondary treatment plant serving 1,425 people in Pomeroy, Washington. It discharges treated wastewater into the local watershed, operating under U.S. EPA NPDES regulations.
South Prairie Area wastewater treatment plant serves 482 people in South Prairie, Washington, with secondary treatment. It discharges treated wastewater into the local watershed, contributing to the Puyallup River basin.
Diamond Lake STP is a secondary treatment plant in Pend Oreille County, Washington, serving 1,698 people. It discharges 276.34 million gallons per year and operates under U.S. EPA NPDES regulations.
IONE LAGOON is a secondary wastewater treatment plant in Pend Oreille County, Washington, serving 215 people. It discharges treated effluent into the local watershed, supporting downstream water quality.
Naselle Youth Camp STF is a secondary treatment plant in Grays Harbor County, Washington, serving 300 people. It discharges 132.49 volume units and operates under US Clean Water Act regulations.
NACHES STP is a secondary wastewater treatment plant serving 725 people in Naches, Washington. It discharges treated effluent into the local watershed within the Yakima River basin.
MORTON STP is a secondary wastewater treatment plant serving 1,125 people in Morton, Washington. It discharges 757.08 cubic meters per day and has a designed capacity of 2,346.95 cubic meters per day.
Mabton POTW is a secondary treatment plant serving approximately 2,290 people in Mabton, Washington. It discharges treated wastewater into the Yakima River basin, an important agricultural watershed in the Pacific Northwest.
McCleary STP is an advanced wastewater treatment plant serving approximately 1,981 residents in McCleary, Washington. It discharges treated effluent into the local watershed, supporting downstream water quality in Grays Harbor County.
Glenwood STP and Collection is a secondary treatment plant serving 808 people in Glenwood, Washington. It discharges 208.20 megaliters of treated wastewater annually and operates under the US Clean Water Act framework.
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.
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.
UtilityRadar indexes 248 wastewater treatment plants in Washington, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, MORTON STP has the highest designed capacity at 2,347 m3/day.