26,154 plants indexed worldwide.
Plants where treatment level information is not publicly available.
CENT KITSAP REG STP is a municipal wastewater treatment plant serving approximately 44,476 people in Brownsville, Washington. It operates under the US Clean Water Act framework with NPDES permitting.
Kennewick POTW is a municipal wastewater treatment plant serving approximately 74,665 people in Kennewick, Washington. It operates under the U. S. Clean Water Act and EPA NPDES permitting framework.
Ilwaco Wastewater Treatment Plant serves approximately 8,100 residents in Ilwaco, Washington. It is located within 50 km of the Pacific coast, discharging treated effluent into the Columbia River estuary.
Hoquiam Wastewater Treatment Plant serves 8,650 people in Hoquiam, Washington. Located within 50 km of the coast, it discharges into Grays Harbor estuary on the Pacific coast.
Granite Falls STP serves approximately 3,370 residents in Granite Falls, Washington. The plant operates under the U.S. Clean Water Act, ensuring treated wastewater meets environmental standards before discharge.
GRANDVIEW STP serves approximately 10,920 residents in Grandview, Washington. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater.
GOLDENDALE POTW serves Centerville, Washington, treating wastewater for approximately 3,425 residents. The plant operates under U.S. Clean Water Act regulations for small communities.
Friday Harbor STP serves 2,680 residents in Friday Harbor, Washington. The plant discharges treated wastewater into the surrounding marine environment of the Salish Sea.
Ferndale STP serves approximately 11,530 residents in Ferndale, Washington. The plant operates under the U.S. Clean Water Act, with a designed capacity of 1.00 million gallons per day.
Everett WWTP serves approximately 149,000 people in Washington, USA. The facility is located near the coast and discharges into the Puget Sound ecosystem.
Enumclaw WWTP serves approximately 10,920 residents in Enumclaw, Washington. The plant operates under U.S. Clean Water Act regulations with a designed capacity of 1.00 million gallons per day.
Ellensburg STP serves approximately 18,250 people in Ellensburg, Washington. The plant discharges treated wastewater into the Yakima River basin, supporting local water quality and downstream ecosystems.
Edmonds STP serves approximately 73,790 residents in Edmonds, Washington. The plant is located within 50 km of the coast and discharges treated wastewater into the Puget Sound ecosystem.
East Wenatchee STP serves approximately 13,220 people in East Wenatchee, Washington. The plant discharges treated wastewater into the Columbia River basin, supporting local water quality.
Duvall WWTP serves approximately 6,715 residents in Duvall, Washington. The plant operates under U.S. Clean Water Act regulations, ensuring treated effluent meets state water quality standards before discharge.
Midway Sewer District WWTP serves Des Moines, Washington, treating wastewater for a population of approximately 43,616. The plant is located within 50 km of the coast and discharges into the Puget Sound watershed.
DAYTON STP serves Dayton, Washington, treating wastewater for approximately 3,068 residents. The plant operates under U.S. EPA and Washington state regulations, discharging into the local watershed.
Castle Rock WWTP serves 2,130 people in Castle Rock, Washington. The plant operates under the US Clean Water Act, with NPDES permits regulating its discharge.
Connell STP is a municipal wastewater treatment plant serving approximately 5,150 people in Connell, Washington. The facility operates under the U.S. Clean Water Act framework, with state-issued NPDES permits governing its discharge.
College Place WWTP serves approximately 8,780 people in Walla Walla County, Washington. The plant operates under the US Clean Water Act, which mandates secondary treatment for municipal wastewater facilities.