248 plants indexed. Showing 244 matching current filters.
RYDERWOOD STP is a secondary wastewater treatment plant in Ryderwood, Washington, serving a small population of 380. It discharges 378.54 cubic meters of treated wastewater daily.
SEKIU STP is a secondary wastewater treatment plant serving 538 people in Port Angeles, Washington. It discharges 378.54 m³/day of treated effluent near the Strait of Juan de Fuca.
Skagit Co SD2 Big Lake WWTP is a secondary treatment plant serving 1,835 people in Big Lake, Washington. It discharges treated wastewater into the local watershed, ultimately draining to Puget Sound.
Snoqualmie Pass UD Treatment is a secondary treatment plant in Hyak, Washington, serving about 1,985 people. It discharges 711.66 million gallons per year into the local watershed.
Soap Lake STP is a secondary treatment plant serving approximately 1,735 residents in Soap Lake, Washington. It discharges treated wastewater into the local watershed, supporting water quality in the region.
South Bend STP CS is a secondary treatment plant serving 1,635 people in Pacific County, Washington. It discharges 632.16 million gallons per year, operating under the US Clean Water Act framework.
South Prairie Area wastewater treatment plant serves 482 people in South Prairie, Washington, with secondary treatment. It discharges treated wastewater into the local watershed, contributing to the Puyallup River basin.
SPANGLE S_T FACILITY is a secondary wastewater treatment plant serving 297 people in Spangle, Washington. It discharges 75.71 million gallons per year and has a designed capacity of 151.42 million gallons.
ST JOHN S_T FACILITY is a secondary wastewater treatment plant in Saint John, Washington, serving 523 people. It discharges treated water into the local watershed.
Stevens Pass Sewer District is a secondary treatment plant in Chelan County, Washington, serving 384 people. It discharges treated wastewater into the local watershed, contributing to the region's water quality management.
SUQUAMISH STP is a secondary treatment plant serving 3,510 people on the Port Madison Indian Reservation in Washington, USA. It discharges 378.54 m³/day of treated wastewater near the Puget Sound coast.
TAHOLAH STP is a secondary treatment plant serving 755 people in Grays Harbor County, Washington. It discharges 302.83 units of treated wastewater near the Pacific coast.
Tamoshan WWTP is a secondary treatment plant in Olympia, Washington, serving 292 people. It discharges 189.27 cubic meters of treated wastewater daily, located within 10 km of the coast.
Tekoa S_T Facility is a secondary treatment plant serving 820 people in Tekoa, Washington. It discharges 757.08 cubic meters of treated wastewater daily.
Toledo STP is a secondary wastewater treatment plant serving 540 people in Toledo, Washington. It discharges treated effluent into the local watershed, operating under US EPA and Washington state regulations.
Tonasket S_T Facility is a secondary treatment plant serving 1,025 people in Tonasket, Washington. It discharges 757.08 m³/day of treated wastewater, with a designed capacity of 946.35 m³/day.
TOUTLE STP is a secondary treatment plant in Cowlitz County, Washington, serving approximately 1,100 people. It discharges 946.35 cubic meters of treated wastewater daily into the local watershed.
Tulalip Bay STP is a secondary treatment plant serving 1,561 people in Tulalip Bay, Washington. It discharges treated wastewater into the Puget Sound coastal environment.
TWISP S_T FACILITY is a secondary treatment plant in Okanogan County, Washington, serving 925 people. It discharges treated wastewater into the local watershed, contributing to the region's water quality management.
Vader S_T Facility is a secondary treatment plant serving 625 people in Vader, Washington. It discharges 454.25 megaliters annually and operates under the US Clean Water Act framework.