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Wet Weather Flow Master Plan (WWFMP)
Wet Weather Flow Master Plan

Toronto City Council adopted the Wet Weather Flow Master Plan (WWFMP) and a 25-Year Implementation Plan in 2003. The goal of the WWFMP is to reduce and ultimately eliminate the adverse impacts of wet weather flow, which is runoff generated when it rains or snows, to protect our environment improve the ecosystem health of the watersheds. The Plan was developed with the recognition that wet weather flow will be managed on a watershed basis accompanied by a hierarchy of solutions starting with “at source”, followed by “conveyance,” and concluding with “end-of-pipe.” What's it all about? Learn more here...


What's new

Coxwell Trunk Sewer
A staff report on the Coxwell Trunk Sewer went to the Public Works and Infrastructure (PWI) Committee on January 6. To view the report and presentation, please click on the below links:

A community meeting was held on Wednesday, January 14 at the East York Civic Centre to discuss the Coxwell sanitary trunk sewer.

Environmental Assessment
In 2008, the City began an Environmental Assessment of the Don and Waterfront Trunk Sewers and Combined Sewer Overflow, which included a condition assessment of the Coxwell Trunk Sewer. Learn more ...


‘Greening’ surface parking lots
The draft Design Guidelines for 'Greening' Surface Parking Lots provide specific strategies and measures which developers, designers and reviewers of surface parking lots can apply and integrate the treatment of stormwater runoff into the surface parking lot design.

2008 Advertising Campaign
Take a look at our recent Rubber Ducky television commercial.

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25-Year Plan 25-Year Implementation Plan
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Annual reports Annual Reports
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Wet Weather Flow (WWF) Management Guidelines Wet Weather Flow (WWF) Management Guidelines
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Current Environmental Assessments Current Environmental Assessments
See the latest

Learn more
WWFMP reports and initiatives
Mandatory downspout disconnection
Wet Weather Flow Master Plan Implementation Advisory Committee
Community Program for Stormwater Management
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