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.

As a regulated distributor of electricity in Ontario, and like all other local distribution companies, Alectra Utilities (formerly PowerStream) is required by law (under Ontario Reg. 416/99) to disclose to our consumers information regarding the Ontario system-wide electricity supply mix. The Ontario Energy Board (OEB) directive requires that this information is distributed annually. Under the same regulation, the Ministry of Energy is responsible for providing Ontario’s electricity supply mix data to electricity distributors.

The table below discloses the system-wide electricity supply mix data for 2017, which was published by the OEB on October 5, 2018.

Ontario's System-Wide Electricity Supply Mix: 2017 Data

Electricity Facts
*Electricity sources*	Ontario’s Electricity Mix*
Water power	25.6%
Alternative power sources	9.8%
Solar PV	2.2%
Wind	7.2%
Biomass	0.4%
Waste	0%
Nuclear Energy	60.1%
Natural Gas**	4.0%
Other	0.3%
Includes both transmission and distribution-connected/embedded generation *Includes duel-fuelled facilities that are predominantly natural gas (e.g. Lennox GeneratingStation) Note: Figures may not add to 100% due to rounding.

Download Ontario’s System-Wide Electricity Supply Mix: 2017 Data (155 KB PDF)

For more information, please contact the Ontario Energy Board or the Independent Electricity System Operator.