Cleanview

Nuclear power plants in California

California has 1 operating nuclear power plants with 2.3 GW of capacity.

  • Operating1
Los AngelesSan FranciscoSan DiegoSacramentoFresno

Under 250 MW250–999 MW1 GW and up

Updated monthly. Last updated November 2026.

The largest nuclear power plants in California

Operating, by capacity

#Nuclear power plantYear onlineCapacity
1Diablo Canyon19862,323 MW

Nuclear power plants that came online most recently in California

Newest first

#Nuclear power plantYear onlineCapacity
1Diablo Canyon19862,323 MW
The developer behind each project is on paid plans. See plans

How Cleanview tracks nuclear power plants

Operating nuclear power plants come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about nuclear power plants in California

How many nuclear power plants are in California?
California has 1 operating utility-scale nuclear power plants with 2.3 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest nuclear power plant in California?
Diablo Canyon in San Luis Obispo County, California is the largest, at 2,323 MW. It came online in 1986.
How many nuclear power plants were built in California in 2025?
0 nuclear power plants came online in California in 2025, with 0 MW of capacity.
Who is developing nuclear power plants in California?
Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

More energy trackers for California

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