♨ Geothermal Power Plants in California
California operates 45 geothermal power plants totaling 2,932 MW of nameplate capacity. Annual generation: 11.3M MWh.
Geothermal plants tap heat from underground reservoirs to spin steam turbines. They provide carbon-free baseload power with very high capacity factors, but they only work where hot rock is accessible — primarily in the western U.S.
Plants45operating
Capacity2,931 MWnameplate
Generation11.3M MWhannual
Where geothermal plants sit in California
All California geothermal plants
| Plant | City | County | Capacity | Operator |
|---|---|---|---|---|
| Geysers Unit 5-20 | Middletown | Sonoma County | 1,163 MW | Geysers Power Co Llc |
| Calistoga Power Plant | Middletown | Lake County | 176 MW | Geysers Power Co Llc |
| Heber Geothermal | Heber | Imperial County | 151 MW | Orcal Geothermal, Inc |
| Geothermal 1 | Middletown | Sonoma County | 110 MW | Northern California Power Agny |
| Geothermal 2 | Middletown | Sonoma County | 110 MW | Northern California Power Agny |
| Coso Finance Partners | Inyokern | Inyo County | 92 MW | Coso Operating Co Llc |
| Coso Power Developers | Inyokern | Inyo County | 90 MW | Coso Operating Co Llc |
| Coso Energy Developers | Inyokern | Inyo County | 90 MW | Coso Operating Co Llc |
| North Brawley Geothermal Plant | Brawley | Imperial County | 80 MW | Ormat Nevada Inc |
| Sonoma California Geothermal | Middletown | Lake County | 78 MW | Geysers Power Co Llc |
| Second Imperial Geothermal | Heber | Imperial County | 75 MW | Orcal Geothermal, Inc |
| Salton Sea Power Llc - Unit 5 | Calipatria | Imperial County | 58 MW | Calenergy Operating Corporation |
| Bottle Rock Power | Cobb | Lake County | 55 MW | Mayacma Geothermal |
| John L. Featherstone Plant | Calipatria | Imperial County | 55 MW | Hudson Ranch Power I Llc |
| Salton Sea Power Gen Co - Unit 3 | Calipatria | Imperial County | 54 MW | Calenergy Operating Corporation |
| Salton Sea Power Gen Co - Unit 4 | Calipatria | Imperial County | 48 MW | Calenergy Operating Corporation |
| Ormesa Iii | Holtville | Imperial County | 46 MW | Ormat Nevada Inc |
| Ce Leathers | Calipatria | Imperial County | 46 MW | Calenergy Operating Corporation |
| Del Ranch Company | Calipatria | Imperial County | 46 MW | Calenergy Operating Corporation |
| Elmore Company | Calipatria | Imperial County | 46 MW | Calenergy Operating Corporation |
| Cd4 | Mammoth Lakes | Mono County | 44 MW | Cd4 |
| Vulcan-Bn Geothermal Power Company | Calipatria | Imperial County | 40 MW | Calenergy Operating Corporation |
| Ormesa I | Holtville | Imperial County | 26 MW | Ormat Nevada Inc |
| Aidlin Geothermal Power Plant | Middletown | Sonoma County | 25 MW | Geysers Power Co Llc |
| Ormesa Ii | Holtville | Imperial County | 24 MW | Ormat Nevada Inc |
| Geo East Mesa Ii | Holtville | Imperial County | 22 MW | Ormat Nevada Inc |
| Salton Sea Power Gen Co - Unit 2 | Calipatria | Imperial County | 20 MW | Calenergy Operating Corporation |
| Mammoth G3 | Mammoth Lakes | Mono County | 15 MW | Ormat Nevada Inc |
| Mammoth G2 | Mammoth Lakes | Mono County | 15 MW | Ormat Nevada Inc |
| Ce Turbo Llc | Calipatria | Imperial County | 12 MW | Calenergy Operating Corporation |
| Mammoth G1 | Mammoth Lakes | Mono County | 10 MW | Ormat Nevada Inc |
| Salton Sea Power Gen Co - Unit 1 | Calipatria | Imperial County | 10 MW | Calenergy Operating Corporation |
| Amedee Geothermal Venture I | Amedee | Lassen County | 3 MW | Hays Ranches, Llc |
| West Ford Flat Power Plant | Middletown | Lake County | — | Geysers Power Co Llc |
| Bear Canyon Power Plant | Middletown | Lake County | — | Geysers Power Co Llc |
| Ormesa Ih | Holtville | Imperial County | — | Ormat Nevada Inc |
| Ormesa Ie | Holtville | Imperial County | — | Ormat Nevada Inc |
| Four Mile Hill | N/A | Siskiyou County | — | Calpine Corporation |
| Telephone Flat | N/A | Siskiyou County | — | Calpine Corporation |
| Buckeye Geothermal Power Plant | Middletown | Lake County | — | Calpine Corporation |
| Wild Horse Power Plant | Middletown | Sonoma County | — | Calpine Corporation |
| Black Rock I | Calipatria | Imperial County | — | Ce Obsidian Energy Llc |
| Black Rock Ii | Calipatria | Imperial County | — | Ce Obsidian Energy Llc |
| Black Rock Iii | Calipatria | Imperial County | — | Ce Obsidian Energy Llc |
| Hudson Ranch Power Ii Llc | Calipatria | Imperial County | — | Hudson Ranch Power I Llc |