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 11,364 MWh 19.9 % 14,816 MWh 22.2 %
Demand 13 MW 17.2 % 20 MW 17.6 %
Thermal 10,671 eMWh 16.8 % 9,693 eMWh 13.7 %
Total energy 22,035 eMWh 18.3 % 24,509 eMWh 17.8 %
Water 0 10m3 1.2 % (1) 10m3 (54.4) %
Greenhouse gas emissions (CO2e) 2,344 tonnes 2,168 tonnes
Energy Cost Savings $ 1,927,696 $ 2,281,689
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?
Total municipalities 15
 Barrie (City of)  Richmond Hill (City of)
 Brampton (City of)  Toronto (City of)
 Caledon (Town of)  Town Hall Challenge
 King (Township of)  Town of Halton Hills
 Markham (City of)  TRCA
 Mississauga (City of)  Vaughan (City of)
 Oakville (City of)  Whitby (Town of)
 Peel (Region of)
Total buildings 91
Total building area 1,037,071 m2
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