26,154 plants indexed worldwide.
Plants where treatment level information is not publicly available.
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.
COLFAX STP is a municipal wastewater treatment plant serving approximately 2,845 residents in Colfax, Washington, United States. It operates under the U.S. Clean Water Act and EPA NPDES permitting framework.
Clarkston STP serves approximately 7,200 residents in Clarkston, Washington. The plant discharges into the Snake River system, a major tributary of the Columbia River.
Salmon Creek STP serves Clark County, Washington, treating wastewater for approximately 90,000 residents. The plant operates under the U. S. Clean Water Act, with discharge likely to the Columbia River basin.
Chewelah S_T Facility is a municipal wastewater treatment plant serving approximately 2,610 residents in Chewelah, Washington, United States. It operates under the US Clean Water Act framework.
CHEHALIS STP serves approximately 9,591 people in Chehalis, Washington. The plant operates under the U.S. Clean Water Act, with a designed capacity of 1.00 million gallons per day.
CENTRALIA STP serves 17,140 people in Lewis County, Washington. The plant operates under the US Clean Water Act and NPDES permit program.
Carnation Treatment is a municipal wastewater facility serving 1,780 people in Carnation, Washington. It operates under U.S. EPA and Washington State regulations, discharging treated effluent to the Snoqualmie River basin.
Camas Wastewater Treatment Plant serves approximately 19,620 residents in Camas, Washington. The facility discharges treated effluent into the Columbia River, supporting downstream water quality in the Pacific Northwest.
Burlington Treatment serves 9,074 people in Burlington, Washington. The plant operates under the US Clean Water Act NPDES permit program, discharging treated wastewater into the Skagit River basin.
Buckley WWTF serves approximately 4,345 residents in Buckley, Washington. The plant operates under U.S. EPA and Washington state regulations for municipal wastewater treatment.