Ontario's System-Wide Electricity Supply Mix
The system-wide supply mix is the combination of power sources used to generate the electricity consumed in Ontario.
Below summarizes the system-wide electricity supply mix data for 2025
ELECTRICITY FACTS
Electricity Sources & Ontario’s Electricity Mix
Nuclear 46.2%
Water Power 22.5%
Natural Gas*Oil/Other 19.4%
Wind 9.3%
Solar 2.1%
Bioenergy 0.4%
Storage 0.1%
*Include Lennox, dual fuel (natural gas/bioenergy) and non-contracted emitting generation consistent with IESO.
Notes: Figures may not add to 100% due to rounding. Figures do not account for the sale and retirement of Clean Energy Credits (CECs)
Click below to download the detailed 2024 supply mix
Click below to see historical data
Ontario’s Electricity Supply Mix Data