3 plants indexed.
Coulee City STP is a secondary treatment plant in Grant County, Washington, serving 565 people. It discharges treated wastewater inland, with a designed capacity of 272.55 and current volume of 264.98.
WARDEN DOMESTIC STP is a secondary treatment plant serving 2,690 people in Grant County, Washington. It discharges 681.37 megaliters annually and operates under U.S. EPA NPDES regulations.
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.