26,154 plants indexed worldwide.
Plants where treatment level information is not publicly available.
Marysville Lagoon serves approximately 60,660 people in Marysville, Washington. The plant operates under the US Clean Water Act and EPA NPDES permitting framework.
The Lynnwood Treatment System in Edmonds, Washington serves approximately 35,860 people. It is located within 50 km of the coast and discharges into the local watershed.
LYNDEN STP serves Lynden, Washington, treating wastewater from approximately 12,060 residents. The plant operates under U.S. Clean Water Act regulations with NPDES permitting.
West Longview WWTP serves approximately 16,629 people in Longview, Washington. The plant discharges treated wastewater into the Columbia River basin, supporting downstream water quality in the Pacific Northwest.
Cowlitz Water Pollution Control Plant in Longview, Washington serves approximately 39,877 people. The facility operates under the U.S. Clean Water Act, discharging treated wastewater into the Columbia River system.
Lake Stevens STP serves approximately 28,210 people in Snohomish County, Washington. The plant operates under the U.S. Clean Water Act and discharges treated wastewater into the local watershed.
REDONDO STP serves Federal Way, Washington, treating wastewater for approximately 35,420 residents. The plant operates under U.S. EPA and Washington state regulations, discharging treated effluent into the Puget Sound watershed.
LAKOTA STP serves approximately 50,050 people in Federal Way, Washington. The plant is located near the coast and discharges into the Puget Sound watershed.
LA CENTER STP serves approximately 2,935 residents in La Center, Washington. The plant treats municipal wastewater before discharging into the local watershed.
KITTITAS STP serves the community of Kittitas, Washington, treating wastewater for approximately 1,430 residents. The plant is located inland, over 50 km from the coast, and discharges into the local watershed.
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.