Ontario Water Wastewater Certification Office
302 The East Mall, Suite 600
Etobicoke, ON M9B 6C7
Hours of Operation : Monday to Friday 8:30 – 5:00 (EST)
Toll Free: 1-877-231-2122
Submit a Question via Email
We respond to emails and voicemails within one business day.
For enquiries on certification program policies and procedures we will provide a response within 15 business days.