Wastewater Treatment

The City of Corvallis operates one wastewater treatment plant, maintains over 200 miles of wastewater collection pipes, and treats over 4 billion gallons of wastewater a year. The sanitary sewer system is a gravity system, which uses eight pump stations to move the wastewater from lower elevation portions of the system to the treatment plant located at NE 2nd Street. The treated wastewater goes through a rigorous series of tests to assure water quality is not compromised as it is discharged back to the Willamette River. Biosolids (or sludge), a byproduct of the treatment process, are stored and recycled each summer as a soil amendment to agricultural fields. For a tour of the wastewater treatment plant, call 541-766-6934.