Backflow Prevention Program

Contact the Toronto Backflow Prevention Group

Call 311 to report:

  • Emergency or backflow incident
  • Non-compliance of backflow protection
  • Failure of backflow prevention devices


For general inquiry, any concern or issue, contact:
Backflow Prevention Program
Toronto Water
275 Merton Street  
Toronto, Ontario M4S 1A7
Tel: 416-394-8888 (Voicemail Only)

Or, you can send your email inquiry to:


Notice of Collection:
"Toronto Water collects your email address only to respond to your inquiry. Your email address is not shared with third parties.

The personal information is collected under the authority of the City of Toronto Act, 2006, ss. 7 and 8 and will be used to answer your inquiry. Questions about this collection can be directed to Toronto Water, 275 Merton Street, Toronto, ON M4S 1A7, Tel: 416-394-8888."