Wastewater Treatment Plant

Wastewater Operator Certification Program


Application Instructions - General instructions and fee information.

Download Application - Download or print the application.

Affidavit of Work Experience - Single form, if needed, for additional employers.

Request Application Packet - Online request for application packet to be mailed to you.

Reciprocity with Other States - To qualify for reciprocity you have to meet Washington State education and experience requirements, have passed a standardized Association of Boards of Certification (ABC) equivalent exam with a score of 70% or higher, hold a valid certification in good standing, and pay the $50 application fee.

Study Materials - Resources to prepare for the exam.


Schedule the Exam - After you apply and receive approval from Ecology, contact Applied Measurement Professionals (AMP) to schedule or reschedule the exam.
Exam Deadlines: None - Computer-based exams are administered Monday through Friday, twice a day.  There are no scheduled exam dates or application deadlines. Applicants can apply for the exam when they meet the qualifications.

Computer-based Test Demo - Check out the computer - based test demo so you know what to expect when you are ready to take the exam.

Sample Exam Questions - Look at some of ABC’s sample questions so you can familiarize yourself with the exam format.

Test Center Locations - The Washington Wastewater Operator Certification Examinations are administered at several locations in Washington and over 190 AMP Assessment Centers geographically located throughout the United States.

Candidate Handbook - What to expect when arriving for the exam.