Ontario Water Wastewater Certification Office

Certificate and License Upgrades (Class 1 to 4)

This page is for operators seeking to upgrade their existing certificates/licenses, or operators looking to obtain a new certificate/license through reciprocity. Please ensure you read all information carefully to ensure that you are eligible to apply for a certificate/license upgrade.

Click here for exam schedule.

Certificate/License Upgrade Application Forms

Drinking Water Certificate Application (WT,WD, and WDS Class 1 to 4, and WQA)

Wastewater License (WWT and WWC Class 1 to 4)

Limited Subsystem Certificate Application (Groundwater and Surface Water)

Reciprocity Application Form

Conditional Drinking Water Certificate and Wastewater License Application

Click here for guidelines to assist you.