248 plants indexed.
GRANGER POTW is a secondary treatment plant serving Parker, Washington. It discharges treated wastewater into the Yakima River basin, supporting local water quality.
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.
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.
Hartstene Pointe STP is a secondary treatment plant in Mason County, Washington, serving 860 people. It discharges 704.09 units of treated wastewater near the coast of Puget Sound.
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.
King County Vashon WWTP is a secondary treatment plant serving 539 people on Vashon Island, Washington. It discharges treated wastewater near the coast of Puget Sound.
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.
Kitsap Co SD 7 WWTP on Bainbridge Island, Washington, serves 750 people with secondary treatment. It discharges 492.10 volume units daily, with a designed capacity of 1059.91 units, and is located within 10 km of the coast.
KLICKITAT STP is a secondary wastewater treatment plant in Murdock, Washington, serving 525 people. It discharges treated effluent into the Columbia River basin, supporting local water quality.
La Conner Treatment is a secondary wastewater plant serving 1,115 people in La Conner, Washington. It discharges 567.81 thousand cubic meters annually and is located within 10 km of the coast.
La Push Sewage Treatment Plant is a secondary treatment facility serving approximately 1,000 residents in La Push, Washington. It discharges treated wastewater near the Quileute Harbor Marina on the Pacific coast.
LaCrosse Wastewater Facility serves 315 people in LaCrosse, Washington, with secondary treatment. The plant discharges 246.05 million gallons per year into the local watershed.
Langley S_T Facility is a secondary treatment plant in Langley, Washington, serving 1,045 people. It discharges 302.83 megaliters annually and is located within 10 km of the coast.
LEWIS CO STP 2 is a secondary wastewater treatment plant serving 311 people in Lewis County, Washington, USA. It discharges 302.83 cubic meters of treated effluent daily.
Lind S T Facility is a secondary wastewater treatment plant serving 560 people in Lind, Washington. It discharges approximately 212,000 gallons per day into the local watershed.
LOON LAKE TREATMENT is a secondary wastewater plant in Stevens County, Washington, serving 634 people. It discharges treated effluent into the local watershed, supporting downstream water quality.
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.
Manchester STP is a secondary treatment plant serving 2,310 people in Manchester, Washington. It discharges 757.08 million gallons per year into the local watershed near Puget Sound.
Mansfield S_T FAC is a secondary treatment plant serving 325 people in Mansfield, Washington. It discharges 151.42 megaliters of treated wastewater annually, operating under U.S. EPA NPDES regulations.
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.