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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.
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Making Savings
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Savings 2025
(vs. 2024)
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Savings Percent
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Savings 2025
(vs. 2023)
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Savings Percent
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Electricity
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316 MWh |
0.4 % |
(3,371) MWh |
(4.0) % |
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Demand
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(1) MW |
(0.4) % |
(5) MW |
(3.3) % |
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Thermal
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4,497 eMWh |
4.9 % |
(278) eMWh |
(0.3) % |
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Total energy
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4,813 eMWh |
2.7 % |
(3,649) eMWh |
(2.0) % |
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Water
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no data |
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no data |
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Not all participant buildings are reporting in all years or in all categories. Savings are reported on a net basis.
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Results as of December 31, 2025
numbers in ( ) are increases |
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What's new?
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Total municipalities
40
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 Barrie (City of)
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Nipawin (Town of)
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Bonnechere Valley (Township of)
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Oakville (Town of)
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Brampton (City of)
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Oxbow (Town of)
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Caledon (Town of)
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Peel (Region of)
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Carleton Place (Town of)
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Prince Albert SK (City of)
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Chapleau (Township Of)
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Richmond Hill (City of)
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Chatham-Kent (Municipality of)
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Stirling-Rawdon (Township of)
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Davidson (Town of)
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Stratford (City of)
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Douro-Dummer (Township of)
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Temagami (Municipality of)
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Espanola (Town Of)
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Thessalon (Town Of)
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Essex County (Town of)
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Toronto (City of)
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Goderich (Town of)
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Town Hall Challenge
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Grandview Municipality
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Town of Allan
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Halton Hills (Town of)
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Town of Grenfell
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Huron Kinloss (Township Of)
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TRCA
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Iroquois Falls (Town of)
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Vaughan (City of)
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King (Township of)
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Village of Westport
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La Broquerie (in Manitoba)
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Whitby (Town of)
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Lamont (Town of)
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Winnipeg (City of)
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Mississauga (City of)
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Wolseley (Township Of)
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Total buildings
163
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Total building area 1,010,670 m2
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