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 2018
(vs. 2017)
Savings Percent Savings 2018
(vs. 2016)
Savings Percent
Electricity 6,400 MWh 4.7 % 9,175 MWh 7.4 %
Demand 3 MW 1.4 % 7 MW 2.7 %
Thermal (6,492) eMWh (4.7) % (4,377) eMWh (3.5) %
Total energy (92) eMWh (0.0) % 4,797 eMWh 1.9 %
Water 16 10m3 3.7 % 60 10m3 14.9 %
Greenhouse gas emissions (CO2e) (1,103) tonnes (710) tonnes
Energy Cost Savings $ 648,536 $ 981,092
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, 2018
numbers in ( ) are increases
What's new?
Total municipalities 15
 Barrie (City of)  Peel (Region of)
 Brampton (City of)  Richmond Hill (City of)
 Caledon (Town of)  Toronto (City of)
 Halton Hills (Town of)  Town Hall Challenge
 King (Township of)  Town of Halton Hills
 Markham (City of)  TRCA
 Mississauga (City of)  Vaughan (City of)
 Oshawa (City of)
Total buildings 128
Total building area 1,133,688 m2
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