Supply Mix Data

Ontario's system-wide electricity supply mix: 2025 data 

Electricity Retailing - Disclosure to Consumers, 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. 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. ​

The system-wide supply mix is the combination of power sources used to generate the electricity used in Ontario. We’re required to disclose this information to our customers on an annual basis. The chart shows the supply mix data for 2025, which was published by the Ontario Energy Board on June 22, 2026. This data should be considered current until further notice.​​
 

¹ Hydro One does not generate electricity.
²Includes Lennox, dual fuel (natural gas/bioenergy) and non-contracted emitting generation consistent with IESO​.​​