Water Quality Permits

PSI Testing Centers will re-open on May 1, 2020, and social distancing protocols will be followed for test takers.  To alleviate scheduling issues due to the temporary closure, all currently approved candidates will have two additional months added to their one year exam-eligibility period.

Oregon law requires owners of wastewater systems and drinking water systems (public and private) to have their systems under responsible control and direction of certified operators. Trained and certified operators are necessary to ensure that the systems are managed in a manner that fully protects public health and the environment.
The Department of Environmental Quality administers the program for domestic wastewater system operators. The Oregon Health Authority Drinking Water Services administers the certification program for drinking water system operators.

Program information


The extension for certificates that expired on June 30, 2020, ends Oct. 15, 2020. If you mail your renewal application documents, postmarked after October 15, the standard reinstatement policy applies, and the additional $120 reinstatement fee is due, along with the $160 renewal fee. You also may not supervise a wastewater system after Oct. 15, 2020 with a certification in expired status.
​Approved training for CEU credit:
  • CEU Lookup:  Select the “Courses" tab at the top to view DEQ-approved wastewater continuing education units (CEUs)
Approved training for Operator in Training (OIT) and Provisional Grade I (when applicant has less than 12 months experience, see Application Instructions Page 1):             
Wastewater CEU Options

Certification database

Find certified operators by name

Find applicants/operators who passed the exam by date

Find Designated System Supervisory Wastewater Operators by Facility



For questions please contact the Certification Program by email or by phone: 503-229-5349 or 503-229-5161

If you need in-person assistance, please contact us to make an appointment. We cannot accommodate customers without appointments.