United States · CANuclear power plants in California
California has 2 operating nuclear reactors, totalling 2,256 net MWe, across 5 plants. 6 reactors have been shut down. The first entered service in 1957.
They are operated by Pacific Gas and Electric.
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Plants
| Plant | Units | Types | Status today | MWe operating |
|---|---|---|---|---|
| Diablo Canyon | 2 | PWR | 2 operating | 2,256 |
| Humboldt Bay | 1 | BWR | shut down | — |
| Rancho Seco | 1 | PWR | shut down | — |
| San Onofre | 3 | PWR | 3 shut down | — |
| Vallecitos | 1 | BWR | shut down | — |
Data: IAEA PRIS · Global Energy Monitor · Wikipedia · updated on Sep 17, 2026
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