Septage Hauler Program

Water Environment Services (WES) septage procedures are designed to comply with all applicable District, State and Federal regulations. Septage is regulated by Rules and Regulations Section 10. The Tri-City Water Pollution Control Plant (TCWPCP) is the only designated receiving facility in WES. Haulers that discharge septage at the TCWPCP are required to have a valid Septic Tank Waste Discharge Permit, which is issued for a three-year period.

Permit Application Process

To apply for a WES Septic Tank Waste Discharge Permit, septage haulers must complete and submit a completed Application for Permit form, current copy of DEQ license for sewage disposal, a $10,000 Surety Bond or Bond Continuation Certificate, a current copy of the DEQ Pumping Truck Inspection Report, and three-year permit* fee. The application review process takes approximately three to five days which the WES staff will then issue or deny a septage discharge permit.

Septic Tank Waste Discharge Permit application can be downloaded online. For additional information, contact WES Industrial Pretreatment Program at 503-557-2834.

* WES Septic Tank Waste Discharge Permit is a three (3) year permit, however, surety bonds, DEQ license, and DEQ Truck Inspection are issued annually. An updated copy of these items must be submitted to WES Septage Program annually.


WES accepts septage originating from within Multnomah, Clackamas and Washington Counties. City, State, and Federal regulations prohibit septage haulers from discharging industrial process wastes at the TCWPCP.

Septage loads are accepted Monday through Friday (except on holidays) between 6 a.m. and 1 p.m.