Procedure in case of sewer backup
Every owner is responsible for the maintenance of the entire length of the sewer connection from the inside of the building to the point of connection to the main public sewer (sanitary and pluvial).
IMPORTANT: No employee intervenes in case of sewer backup.
In the case of an blockage on the private domain
The owner must call upon a plumbing contractor of his or her choice who will evaluate the situation. As a result of the evaluation:
If the blockage is on the private domain:
The owner must carry out the necessary work to unblock the connection and bear the costs.
REMINDER: It is necessary to obtain a permit for work on the private domain. If an excavation is required, a permit is also required.
If the blockage is on the public domain:
The owner can make a request for corrective work of the part of a sewer connection that is in the public domain, when certain conditions are met (see Regulation 15-085, Chapter 2).
The request for corrective work must include:
• Corrective application form (in French) duly completed by the owner or contractor. (See By-law 15-085, Schedule A)
• The completed Inspection Report (in French) showing the failure and its location. (See By-law 15-085, Schedule B)
• A video in digital format on a USB key allowing for the observation of the failure and its location.
REMINDER: Following a blockage located on the public domain, the owner can file a claim with the Bureau des réclamations of Ville de Montréal to obtain the reimbursement of the sums he will have paid to his private contractor. The citizen must contact the Bureau des réclamations of Ville de Montréal for the follow-up of his request. The final settlement decision rests with the Ville de Montréal litigation department. Thus, the Public Works Department cannot communicate any information relating to his complaint file.