26,154 plants indexed worldwide.
Plants where treatment level information is not publicly available.
NEWPORT STP serves Newport, Washington, treating wastewater for approximately 3,040 residents. The plant operates under U.S. EPA and Washington state regulations, discharging into the Pend Oreille River watershed.
Mount Vernon Treatment serves approximately 31,940 people in Mount Vernon, Washington. The plant is located within 50 km of the coast and discharges into the Skagit River system, which flows into Puget Sound.
Moses Lake STP serves approximately 10,820 residents in Moses Lake, Washington. The plant discharges into the local watershed, supporting water quality in the Columbia River basin.
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.
Brightwater Treatment Plant in Maltby, Washington serves approximately 597,000 people. It is a major facility in the Puget Sound region, operating under U. S. EPA and Washington State regulations.
West Point WWTP in Seattle, Washington, serves over 1.3 million people. It is a major coastal treatment plant discharging into Puget Sound, operating under the US Clean Water Act.
King County South Treatment Plant in Renton, Washington, serves approximately 787,000 people. It is a major regional facility within 50 km of the Pacific coast, operating under the US Clean Water Act.
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.
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.