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Ontario’s System-Wide Electricity Supply Mix: 2018 Data

O. Reg. 416/99, requires retailers to disclose to consumers the Ontario system-wide electricity supply mix in the manner established by the Ontario Energy Board. The Board’s Directive for the Disclosure of Information to Consumers by Electricity Retailers under Ontario Regulation 416/99 prescribes the manner and timing requirements for this disclosure. The Directive applies to all retailers, including distributors that provide standard supply service.

Under O. Reg. 416/99 the Ministry of Energy is responsible for providing Ontario’s electricity supply mix data for electricity suppliers. The following label discloses the system-wide electricity supply mix data for 2018. This data must be used by electricity suppliers for the purposes of complying with the disclosure obligations of O. Reg. 416/99 and the Directive. This data should be considered current until further notice


Electricity             Facts

 Ontario's Electricity Mix

(System-Wide Generation in TWh)

Electricity Source 

Tx-Connected (direct)

Dx-Connected (embedded)  Total


 90.1 - 90.1
 Water Power 36.2 0.73 36.93
 Natural Gas*  9.6 - 9.6
 Wind 10.7 1.6 12.3
 Solar PV


2.89 3.49
 Bioenergy** 0.4 0.38 0.78
 Non-Contracted*** - 1.2 1.2
 Total 147.6 6.8 154.4

*Includes Lennox, dual fuel (ng/bio) consistent with IESO.
** IESO’s embedded generation data set merges biomass and gas.
*** Non-Contracted represents a variety of fuel types that the IESO is unable tocategorize due to a lack of information from Local Distribution Companies (LDCs).
Note: Figures may not add to 100% due to rounding.