14,814 plants indexed. Showing 5,627 matching current filters.
Sand Dunes WWTP serves 16,836 people in Grant County, Washington. The plant operates under the US Clean Water Act, with NPDES permits regulating its discharge to protect local water quality.
Montesano WWPCP serves 3,232 people in Montesano, Washington, discharging treated wastewater into the Chehalis River basin. The plant operates under the US Clean Water Act NPDES permit program.
MONROE STP serves approximately 17,330 people in Monroe, Washington. The plant operates under the US Clean Water Act, with a designed capacity of 1.00 million gallons per day.
Medical Lake STP serves approximately 6,860 residents in Medical Lake, Washington. The plant operates under U.S. Clean Water Act regulations for municipal wastewater treatment.
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.
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.
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.
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.
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.
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.
UtilityRadar indexes 14814 wastewater treatment plants in United States, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, MONTESANO WWPCP has the highest designed capacity at 1 m3/day.