Electricity Facts

Electricity Supply Mix

In Ontario, electricity is produced from a number of sources. The Electricity Supply Mix, for an electricity product, is the combination of power sources used to generate the product.

The following chart shows the combination of electricity sources used to generate the electricity consumed in Ontario in 2019.

Pie chart showing the breakdown of Ontario's supply mix

Electricity Source	Ontario's Electricity Mix
Nuclear	58.2%
Water Power	24.0%
Natural Gas*	6.1%
Wind	8.2%
Solar PV	2.4%
Bioenergy**	0.5%
Non-Contracted***	0.6%

*Includes Lennox & dual fuel (natural gas/bioenergy) consistent with IESO.

** IESO's embedded generation data set combines biomass and gas.

*** Non-Contracted represents a variety of fuel types that the IESO is unable to categorize due to a lack of information from Local Distribution Companies (LDCs).

Note: Figures may not add to 100% due to rounding.

2019 information courtesy the Ontario Energy Board.

For a near real-time supply mix breakdown, please visit the Independent Electricity System Operator.