Examinees who do not pass the exam by January 15, 2027, may be required to submit a new application, due to upcoming system upgrades. Candidates are advised to retain a copy of their exam approval notification for future reference.
Looking for a status update?
If you applied online and it has been more than 4 weeks please contact our office.
On-Site Inspector Certificate of Competency
All applicants are required to take the On-Site Wastewater Treatment Systems Designers exam. To be considered for approval you must submit a complete application to the board office.
If you have a certificate of competency, you may perform on-site design services for local health jurisdictions, but may not practice as a licensed on-site designer.
Application Requirements
- Employment at a local health jurisdiction
- One year of practical work experience under the direct supervision of a certificate of competency holder, licensed designer or Professional Engineer.
- A written request for certification from your Local Health Director or designee
- A passing score (80%) on the Washington On-Site Law Review
- A passing score on the written On-Site Designer License Exam
Required Documentation
- Complete the On-Site Wastewater Treatment System Inspector Certificate of Competency Application
- Pay your fee (see form directions)
- Complete the Work Experience Form and Experience Verification Form (see forms for instructions)
- Ensure your verifier’s email is correct and they can access it. If the verifier or email is incorrect, you must submit a new Work Experience form. Staff cannot change this information after submission.
- Have the director/director designee of the Health Department/Jurisdiction sign the DOH request for Examination form and submit it with your application
- Pass the Washington On-Site Law Review
How to Apply
Important: do not apply until you meet all requirements
- Login or Sign-up to apply and pay your application fee.
- Access our service Board of Registration for Professional Engineers & Land Surveyors (BRPELS).