2 plants indexed.
ECHO STP is a secondary treatment plant in Umatilla County, Oregon, serving 690 people. It discharges 227.13 volume units daily and has a designed capacity of 454.25 volume units.
Pilot Rock STP is a secondary treatment plant serving 1,540 people in Umatilla County, Oregon. It discharges 643.52 thousand cubic meters annually within the Columbia River Basin.