Wastewater Operator Certification Program

Wastewater treatment plants (WWTPs) serve an essential function to protect public health and the environment, including Washington's rivers, lakes, streams, and Puget Sound. The certification of wastewater treatment plant operators helps make sure they are knowledgeable, and that WWTPs are properly operated and maintained.

Wastewater Operator Certification Program Draft Fee Schedule

We propose to maintain wastewater operator certification (OpCert) program fees at their current level.

The public comment period is now open for the OpCert program draft fee schedule. We will accept public comments from March 31, 2021 through 11:59 pm on May 15, 2021, as required by WAC 173-230-240.

Draft Fee Schedule for Fiscal Years 2022 and 2023

Category Fiscal Year 2022

July 1, 2021- June 30, 2022

Fiscal Year 2023

July 1, 2022 - June 30, 2023

Group I and Group I OIT Applications $50 $50

Groups II - IV and
Groups II - IV OIT

$67 $67
Renewals $98 $98

How to comment?

We prefer to receive comments on the Draft Fee Schedule through our online comment form.

However, we will accept emailed comments to opcert@ecy.wa.gov and written comments sent to:

Poppy Carre
PO Box 47696
Olympia WA 98504-7696

Please contact opcert@ecy.wa.gov or Poppy Carre at 360-407-6889 with any questions.

Frequently asked questions: coronavirus impacts to the OpCert Program (updated April 6, 2021)


Professional growth

On-call emergency operator list

Operator communication

Drawing by James Davis

Wastewater Treatment Plant Operator Certification Program Guidance

We adopted changes to chapter 173-230 WAC Certification of Operators of Wastewater Treatment Plants in 2019. This:

  • Established a fee schedule in rule as directed by the Legislature in 2018.
  • Included multiple changes, such as:
    • Providing for an Operator in Training and respective education and experience qualifications for Groups II-IV.
    • Acknowledging new technologies in wastewater treatment.
    • Creating stand-alone sections where more information and clarity were needed.
    • Clarifying rule language to codify existing program practice.

Find out more about the new fees and Operator in Training Group levels II-IV from our focus sheet.
To learn even more, visit the rulemaking webpage.