two images of workers at a water treatment facility


Welcome to the website for the Ontario Water Wastewater Certification Office. Explore our site to learn about operator licencing and certification under Ontario Regulations 128/04, 129/04, and 170/03.

Careers in Water and Wastewater

Water and wastewater operators serve their communities by protecting public health and the natural environment. For information on the type of careers you can expect in the water/wastewater industry, go to


► Water Professional International Survey

Water Professionals International (formerly ABC) is inviting wastewater treatment and collection operators to participate in Job Analysis surveys. Complete the survey by June 9, 2023, to be entered into a draw for a chance to win a gift card, with the top prize being worth $1000! Have your say, help keep the exams topical, and earn a shot at a prize!

WCWC New Course Listing
Click here for WCWC Course Listing.

Operator Certification Bulletin
Download and read the latest Operator Certification Bulletin, the Drinking Water and Wastewater Operator Certification News by clicking HERE.

To subscribe to our email news bulletin Click HERE.

Operator Certification Working Group (OCWG)
The OCWG provides expertise to the Ministry on matters related to the water and wastewater operator certification program.

For recent meeting highlights, please go to

Upcoming Exams


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