18,358 plants indexed worldwide.
Biological process removes dissolved organic matter after primary treatment.
Kingston STP is a secondary treatment plant serving 1,871 people in Kingston, Washington. It discharges 435.32 million gallons per year and is located within 10 km of the coast.
Harrington S T FAC is a secondary wastewater treatment plant in Harrington, Washington, serving 420 people. It discharges 253.62 million gallons annually and operates under the US Clean Water Act.
Harrah S_T Facility is a secondary wastewater treatment plant serving 512 people in Harrah, Washington. It discharges 151.42 megaliters annually and has a designed capacity of 302.83 megaliters.
GARFIELD S_T FACILITY is a secondary wastewater treatment plant in Elberton, Washington, serving 640 people. It discharges 264.98 million gallons per year and operates under US EPA NPDES regulations.
Farmington S_T FAC is a secondary wastewater treatment plant in Farmington, Washington, serving a small population of 123. It discharges treated water into the local watershed, contributing to the region's water quality management.
Everson S_T Facility is a secondary wastewater treatment plant serving 3,837 people in Everson, Washington. It discharges 454.25 million gallons per year and operates under US EPA NPDES regulations.
ENTIAT S_T FACILITY is a secondary treatment plant in Chelan County, Washington, serving 1,635 people. It discharges 302.83 megaliters per year and operates under US EPA NPDES regulations.
Endicott S_T Facility is a secondary treatment plant serving 360 people in Endicott, Washington. It discharges 567.81 volume units and operates under US EPA NPDES regulations.
ELBE STP is a secondary treatment plant serving 176 people in Elbe, Washington. It discharges 30.28 megaliters of treated wastewater annually, with a designed capacity of 37.85 megaliters.
DEER PARK POTW is a secondary treatment plant in Spokane County, Washington, serving 3,675 people. It discharges 972.85 units of treated wastewater and has a designed capacity of 2,634.64 units.
DAVENPORT LAGOON is a secondary wastewater treatment plant in Davenport, Washington, serving 1,780 people. It discharges 605.67 megaliters per year and operates under the US Clean Water Act NPDES permit system.
Cusick Wastewater Treatment Plant serves 360 residents in Cusick, Washington, with secondary treatment. It discharges 227.13 megaliters annually and has a designed capacity of 264.98 megaliters.
Creston Wastewater Treatment Plant serves 235 people in Creston, Washington, with secondary treatment. The plant discharges treated wastewater into the local watershed, supporting downstream water quality in the Columbia River basin.
Coulee Dam S_T FAC is a secondary wastewater treatment plant serving 2,138 people in Coulee Dam, Washington. It discharges 946.35 megaliters annually and operates under US EPA NPDES regulations.
Coulee City STP is a secondary treatment plant in Grant County, Washington, serving 565 people. It discharges treated wastewater inland, with a designed capacity of 272.55 and current volume of 264.98.
Conconully S_T FAC is a secondary treatment plant serving 524 people in Conconully, Washington. It discharges treated wastewater into the local watershed, supporting downstream water quality in the Okanogan River basin.
Bridgeport WWTP is a secondary treatment plant serving 2,405 people in Bridgeport, Washington. It discharges 757.08 m³/day of treated wastewater, with a designed capacity of 1,135.62 m³/day.
Brewster STP is a secondary wastewater treatment plant serving 2,262 residents in Brewster, Washington. It discharges treated effluent into the Columbia River basin, supporting local water quality.
Albion S_T Facility is a secondary wastewater treatment plant serving 620 people in Albion, Washington. It discharges treated effluent into the local watershed, supporting downstream water quality in the Palouse River basin.
Buena WWTF is a secondary treatment plant in Buena, Washington, serving 210 people. It discharges 227.13 cubic meters of treated wastewater daily, with a designed capacity of 454.25 cubic meters.