Welcome to the Ontario Water Wastewater Certification Office. This website will assist you through the process of certification and licensing under Ontario regulations 170/03, 128/04 of the Safe Drinking Water Act and 129/04 of Ontario Water Resources Act. If this is your first time visiting us, we recommend that you go the “Getting Started” section.




List of Independent Training Organizations


Website Accessibility Options


Job Posting – The Ministry of Environment and Climate Change is seeking a Certification Officer.  To view the posting Click HERE.
Download and read the latest Operator Certification Bulletin, the Drinking Water and Wastewater Operator Certification News. (Click HERE)
To subscribe to our email news bulletin Click HERE.


Operator Certification Working Group meeting highlights (Click HERE)
For information on new Walkerton Clean Water Centre course offerings (Click HERE)





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