Watercom Engineering

Downspout Disconnection Services



In 2007, Toronto City Council approved mandatory downspout disconnection for the core area of the City of Toronto. Downspout are pipes that carry rainwater/snowmelt from the roof of your home or eavestrough down to a drain pipe (usually connecting to the sewer system) or to the ground.

The new bylaw requires homeowners who live within the affected area to disconnect their homes’ downspouts from the City’s sewer system within three years (by the end of 2010). City inspectors will inspect properties for compliance with the bylaw after the mandatory implementation date. Fines may be issued for noncompliance.

Specific wards effected by the program include: 13, 14, 17, 18, 19, 20, 21, 22, 27, 28, 29, 30, 31, 32 and portions of Wards 11, 12, 15, 16, 25, 26, 35, 36, and 37. Your home may be located within one of these Wards.

Proper downspout disconnection involves determination of the location of existing downspouts and points of discharge, estimation of runoff volumes and flow rates from each downspout, assessment of site drainage characteristics, preparation of a post-disconnection site drainage plan, detailed design of drainage components and implementation by a qualified contractor.

Improper downspout disconnection may result in basement flooding, foundation wall cracking, frost heave, excessive yard pooling and soft ground conditions, safety issues related to runoff freezing and other drainage-related problems. Liabilities resulting from discharging site runoff to adjacent municipal or private property may arise.

WATERCOM ENGINEERING can provide the following services:

  • Site investigation to document existing drainage conditions
  • Preparation of a drainage and stormwater management plan
  • Detailed design of the proposed solution, including necessary site modifications
  • Implementation of downspout disconnection and site modifications
  • Preparation of a stormwater management report as documentation for City inspector

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