The Pickering nuclear generating station is Ontario’s smallest commercial nuclear facility. Its four CANDU pressurized heavy water (PHWR) reactors – the smallest in Canada – are owned and operated by Ontario Power Generation (OPG). Despite their smaller size, the CANDU units at the Pickering station can power up to 2.5 million households.
| Pickering A Unit 1 | 515 | 1971 |
|
| Pickering A Unit 2 | 515 | 1971 | 1997 |
| Pickering A Unit 3 | 515 | 1973 | 1997 |
| Pickering A Unit 4 | 515 | 1973 | |
| Pickering B Unit 5 | 516 | 1983 | |
| Pickering B Unit 6 | 516 | 1984 | |
| Pickering B Unit 7 | 516 | 1985 | |