Under O. Reg. 416/99 the Ministry of Energy is responsible for providing Ontario’s electricity supply mix data for electricity suppliers. The following table discloses the system-wide electricity supply mix data for 2021. 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.
| 2021 Electricity Facts | |
| Electricity sources | Ontario’s Electricity Mix |
| Nuclear Energy | 55.3% |
| Water Power | 23.3% |
| Natural Gas* | 8.1% |
| Wind | 9.0% |
| Solar PV | 2.5% |
| Bioenergy** | 0.5% |
| Non-Contracted*** | 1.2% |
| *Includes Lennox and 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 tocategorize due to a lack of information from Local Distribution Companies (LDCs). Note: 1.Figures may not add to 100% due to rounding. 2.Figures do not account for the sale and retirement of Clean Energy Credits(CECs).
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To fulfill the requirements of the Regulation, the OEB presents the information in percentages. To support the changes the IESO has made to the presentation of their distribution-connected data, the supply mix data in the table below is also presented in Terawatt-hours (TWh).
| 2021 Electricity Facts | |||
| Ontario’s Electricity Mix
(System-Wide Generation in terawatt-hour – TWh) |
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| Electricity Source | Tx-Connected (direct) | Dx-Connected
(embedded) |
Total |
| Nuclear | 83.0 | – | 83.0 |
| Water Power | 34.2 | 0.8 | 35.0 |
| Natural Gas* | 12.2 | – | 12.2 |
| Wind | 12.0 | 1.5 | 13.5 |
| Solar PV | 0.8 | 3.0 | 3.7 |
| Bioenergy** | 0.4 | 0.3 | 0.7 |
| Non-Contracted*** | 0.01 | 1.8 | 1.9 |
| Total | 142.5 | 7.5 | 150.0 |
| * Includes Lennox and 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: 1. Components may not sum to the total due to rounding. 2. Figures do not account for the sale and retirement of Clean Energy Credits (CECs).
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