General Application Instructions

Mail applications with fees to:
Department of Ecology
Cashiering Unit
PO Box 47611
Olympia, WA 98504-7611


Application Fee - $50 for wastewater exam; upgrade from Operator in Training to Group I; reciprocity; and temporary certification.

Exam Fee - $31 for Association of Boards of Certification exam

Testing Service Fee - $67 for exam administration fee

Department of Corrections Fee - $92.50 ($50 for application fee and $42.50 for exam fee)

Department of Corrections Exam Retake Fee - $42.50 for exam fee

Download or print wastewater application

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

If you have any questions or need further assistance, please contact Poppy Carre at 360-407-6449 or toll free in Washington at 1-800-633-6193 or email

If you have special accommodation needs, please call the Certification Coordinator 360-407-6449 (Voice) or (TTY) at 711 or 1-800-833-6388.

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