Mayors' Megawatt Challenge
Founded in 2003,the Mayors’ Megawatt Challenge brings together municipalities of every size from across North America to lower energy use,emissions, and operating costs in their own facilities, while demonstrating leadership in climate change action within their communities. Members manage data, assess their energy and environmental performance, set targets and track savings over time. They develop and share knowledge and best practices through data-driven research,webinars and networking to help plan, implement and verify improvements.

The Mayors' Megawatt Challenge is a program of the Climate Challenge Network.
Making Savings
  Savings 2020
(vs. 2019)
Savings Percent Savings 2020
(vs. 2018)
Savings Percent
Electricity 19,782 MWh 18.9 % 23,721 MWh 20.6 %
Demand 27 MW 16.8 % 31 MW 16.3 %
Thermal 15,027 eMWh 13.5 % 10,891 eMWh 9.3 %
Total energy 34,809 eMWh 16.1 % 34,612 eMWh 14.9 %
Water 46 10m3 40.7 % 38 10m3 39.3 %
Greenhouse gas emissions (CO2e) 3,579 tonnes 2,663 tonnes
Energy Cost Savings $ 3,231,707 $ 3,563,127
Not all participant buildings are reporting in all years or in all categories. Savings are reported on a net basis.
Results as of December 31, 2020
numbers in ( ) are increases
What's new?
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Total municipalities 16
 Barrie (City of)  Prince Albert SK (City of)
 Brampton (City of)  Richmond Hill (City of)
 Caledon (Town of)  Toronto (City of)
 King (Township of)  Town Hall Challenge
 Markham (City of)  Town of Halton Hills
 Mississauga (City of)  TRCA
 Oakville (Town of)  Vaughan (City of)
 Peel (Region of)  Whitby (Town of)
Total buildings 94
Total building area 1,071,566 m2
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