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Ontario’s System-Wide Electricity Supply Mix: 2021 Data
Where did Ontario’s 2021 electricity come from?
| 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 to categorize due to a lack of information from Local Distribution Companies (LDCs). Note: |
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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.
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) | |||
| 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: |
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