Permit Library › Municipal: City of Toronto › Toronto Water & Engineering & Construction Services › Sewer & watermain approvals
Drinking Water Works Permit (DWWP) / Watermain Approval
A DWWP ("Schedule B") approval for watermain works.
You need it when: You modify, relocate, divert or build municipal watermains.
Why it's needed
- Required for municipal drinking-water works.
When to apply
- Same route as the ECA: applicant → ECS → Toronto Water Transfer of Review → DWWP issued.
Review time
Plan for about 10 business days.
Documents for a complete application
- DWWP application forms
- Stamped watermain drawings per the City Design Criteria
- Disinfection/commissioning plan
- DWWP checklist
Submission checklists
- Municipal Drinking Water Works Permit (DWWP)
- Design Submission Checklist: Linear Infrastructure Projects (TPUR)
How to submit
- Engineering & Construction Services.
Often needed first
Official pages
Track Drinking Water Works Permit (DWWP) / Watermain Approval free.
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Sources are marked in the text: [TO] toronto.ca pages, [Guide] general industry guidance, [Plan] permit planning practice. Confirm on the official page before applying.