Wastewater Collection

The wastewater collection system in Corvallis gathers sanitary sewage from sinks, tubs, toilets, and other household and commercial drains, and transfers it to the wastewater plant for treatment. There are over 200 miles of pipe ranging in size from 4 to 72 inches in diameter that make up the collection system, along with 3,900 manholes which provide access to the system. 

In the older sections of Corvallis (about 30% of the entire collection system), the sanitary and storm systems are combined and go to the wastewater plant for treatment.

Corvallis Public Works Department inspects the wastewater collection system using state-of-the-art technology including remote video camera inspections and smoke testing of sanitary lines. If you experience a sewer back-up, call Public Works at 541-766-6916 to report the problem.

For more information or to report problems with the wastewater system, call Public Works at 541-766-6916.