Directory of Power Plants in California
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Ocotillo Wells | Conductive Power | Borrego Springs, CA | California Independent System Operator (CISO) | 112.8 GWh | Aug 2023 | Mar 2025 | Solar |
| Oberon Solar Project | IP Oberon LLC | Desert Center, CA | California Independent System Operator (CISO) | 544.8 GWh | Aug 2023 | Mar 2025 | Solar |
| Oberon II Solar Project | IP Oberon II, LLC | Desert Center, CA | California Independent System Operator (CISO) | 593.0 GWh | Aug 2023 | Mar 2025 | Solar |
| Orange Coast College PH2 Solar Project | Solar Star Coastal Pirate, LLC | Costa Mesa, CA | California Independent System Operator (CISO) | 4.6 GWh | Apr 2022 | Dec 2023 | Solar : 88.9% Electricity used for energy storage : 11.1% |
| Oasis Alta | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 45.4 GWh | Mar 2021 | Dec 2023 | Wind |
| OK Produce Fresno Carport | OK Produce | Fresno, CA | California Independent System Operator (CISO) | 3.1 GWh | Dec 2018 | Dec 2023 | Solar |
| One Ten Partners PV | One Ten Partners, LLC | Palmdale, CA | California Independent System Operator (CISO) | 5.4 GWh | Aug 2017 | Dec 2023 | Solar |
| Oro Loma | Consolidated Edison Development Inc. | Oro Loma, CA | California Independent System Operator (CISO) | 25.3 GWh | Dec 2016 | Dec 2023 | Solar |
| Owens Valley Solar Project 11 | Los Angeles Department of Water & Power | Olancha, CA | Los Angeles Department of Water and Power (LDWP) | 2.3 GWh | Nov 2016 | Dec 2023 | Solar |
| Orion Solar II | Orion Solar II, LLC | Arvin, CA | California Independent System Operator (CISO) | 18.3 GWh | May 2014 | Dec 2023 | Solar |
| Orion Solar I | Orion Solar I LLC | Arvin, CA | California Independent System Operator (CISO) | 28.9 GWh | Mar 2014 | Dec 2023 | Solar |
| Otoe Solar Power Generation Station 1 LLC | AES Distributed Energy | Apple Valley, CA | California Independent System Operator (CISO) | 3.5 GWh | Nov 2013 | Dec 2023 | Solar |
| Oltmans SCE at Jurupa | California PV Energy LLC | Ontario, CA | California Independent System Operator (CISO) | 1.7 GWh | Nov 2013 | Dec 2023 | Solar |
| Oltmans SCE at Champagne | California PV Energy LLC | Ontario, CA | California Independent System Operator (CISO) | 1.2 GWh | Nov 2013 | Dec 2023 | Solar |
| Oakley Solar Project | Oakley Solar Project LLC | Oakley, CA | California Independent System Operator (CISO) | 2.4 GWh | May 2013 | Dec 2023 | Solar |
| Occidental College Solar Project | Occidental College | Los Angeles, CA | Los Angeles Department of Water and Power (LDWP) | 1.6 GWh | Jan 2013 | Dec 2023 | Solar |
| Ocotillo Express LLC | Pattern Operators LP | Ocotillo, CA | California Independent System Operator (CISO) | 523.7 GWh | Nov 2012 | Mar 2025 | Wind |
| Orange Grove Peaking Facility | Orange Grove Energy LP | Pala, CA | California Independent System Operator (CISO) | 18.1 GWh | May 2010 | Dec 2023 | Natural Gas |
| Otay Mesa Generating Project | Otay Mesa Energy Center LLC | San Diego, CA | California Independent System Operator (CISO) | 2.2 TWh | Sep 2009 | Mar 2025 | Natural Gas |
| Oasis Wind | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 205.4 GWh | Nov 2004 | Dec 2023 | Wind |
| One Market Plaza | Paramount Group Inc | San Francisco, CA | California Independent System Operator (CISO) | 993.0 MWh | Nov 2003 | Dec 2023 | Natural Gas |
| Oroville Cogeneration LP | Oroville Cogeneration LP | Oroville, CA | California Independent System Operator (CISO) | 235.0 MWh | Dec 1989 | Dec 2023 | Natural Gas |
| Olsen | Olsen Power Partners | Whitmore, CA | California Independent System Operator (CISO) | 18.4 GWh | Dec 1989 | Dec 2023 | Water |
| Ormesa II | Ormat Nevada Inc | Holtville, CA | Imperial Irrigation District (IID) | 95.0 GWh | Apr 1989 | Dec 2023 | Geothermal |
| Ormesa III | Ormat Nevada Inc | Holtville, CA | Imperial Irrigation District (IID) | 68.5 GWh | Apr 1989 | Dec 2023 | Geothermal |
| OLS Energy Chino | OLS Energy-Chino | Chino, CA | California Independent System Operator (CISO) | 10.7 GWh | Nov 1987 | Dec 2023 | Natural Gas |
| Olive View Medical Center | Los Angeles County DHS | Sylmar, CA | Los Angeles Department of Water and Power (LDWP) | 11.4 GWh | Jan 1987 | Feb 2024 | Natural Gas |
| Ormesa I | Ormat Nevada Inc | Holtville, CA | Imperial Irrigation District (IID) | 101.7 GWh | Nov 1986 | Dec 2023 | Geothermal |
| Oxnard Paper Mill | New-Indy, Oxnard LLC | Oxnard, CA | California Independent System Operator (CISO) | 192.3 GWh | Feb 1986 | Mar 2025 | Natural Gas |
| Oxnard | Procter&Gamble Paper Products Co-Oxnard | Oxnard, CA | California Independent System Operator (CISO) | 483.8 GWh | Jun 1982 | Mar 2025 | Natural Gas |
| Oak Creek Energy Systems I | Terra-Gen Operating Co-Wind | Mojave, CA | California Independent System Operator (CISO) | 37.8 GWh | May 1982 | Dec 2023 | Wind |
| Oxnard Wastewater Treatment Plant | Oxnard City of | Oxnard, CA | California Independent System Operator (CISO) | 4.7 GWh | Jul 1981 | Mar 2025 | Other Biomass Gas : 93.4% Natural Gas : 6.6% |
| Ormond Beach | Ormond Beach Power, LLC | Oxnard, CA | California Independent System Operator (CISO) | 45.1 GWh | Jul 1971 | Mar 2025 | Natural Gas |
| Oxbow (CA) | Placer County Water Agency | Foresthill, CA | California Independent System Operator (CISO) | 13.8 GWh | Sep 1966 | Dec 2023 | Water |
| OES Biogas Power | Organic Energy Solutions, Inc. | San Bernardino, CA | California Independent System Operator (CISO) | 348.0 MWh | - | Dec 2023 | Other Biomass Gas |
Browse Power Plants By California Counties
Figures are based on March 2025 generation numbers.| County | State Rank | Active Plants | Mar 2025 Generation |
|---|---|---|---|
| Sierra County, CA | # 55 | 3 | 2.3 GWh |
| Marin County, CA | # 54 | 3 | 7.4 GWh |
| Mendocino County, CA | # 53 | 4 | 11.1 GWh |
| Glenn County, CA | # 52 | 2 | 16.5 GWh |
| Napa County, CA | # 51 | 7 | 48.3 GWh |
| Santa Cruz County, CA | # 50 | 6 | 64.7 GWh |
| Tehama County, CA | # 49 | 7 | 71.5 GWh |
| San Francisco County, CA | # 48 | 10 | 76.5 GWh |
| San Mateo County, CA | # 47 | 10 | 125.9 GWh |
| Yolo County, CA | # 46 | 15 | 226.6 GWh |
| Siskiyou County, CA | # 45 | 8 | 234.3 GWh |
| Mariposa County, CA | # 44 | 2 | 250.6 GWh |
| San Benito County, CA | # 43 | 5 | 324.4 GWh |
| Santa Barbara County, CA | # 42 | 18 | 339.1 GWh |
| Lassen County, CA | # 41 | 9 | 339.7 GWh |
| Merced County, CA | # 40 | 25 | 342.8 GWh |
| Nevada County, CA | # 39 | 12 | 343.4 GWh |
| Humboldt County, CA | # 38 | 10 | 474.0 GWh |
| Trinity County, CA | # 37 | 5 | 545.3 GWh |
| Calaveras County, CA | # 36 | 6 | 713.3 GWh |
| Amador County, CA | # 35 | 7 | 780.8 GWh |
| Mono County, CA | # 34 | 9 | 794.9 GWh |
| Ventura County, CA | # 33 | 30 | 795.5 GWh |
| Tulare County, CA | # 32 | 53 | 891.1 GWh |
| Lake County, CA | # 31 | 10 | 900.9 GWh |
| Madera County, CA | # 30 | 26 | 969.7 GWh |
| Inyo County, CA | # 29 | 23 | 1.2 TWh |
| Yuba County, CA | # 28 | 4 | 1.7 TWh |
| County | State Rank | Active Plants | Mar 2025 Generation |
|---|---|---|---|
| El Dorado County, CA | # 27 | 15 | 1.7 TWh |
| Sutter County, CA | # 26 | 7 | 1.8 TWh |
| Plumas County, CA | # 25 | 13 | 1.9 TWh |
| San Joaquin County, CA | # 24 | 40 | 2.3 TWh |
| Placer County, CA | # 23 | 21 | 2.5 TWh |
| Stanislaus County, CA | # 22 | 24 | 2.6 TWh |
| Alameda County, CA | # 21 | 43 | 2.6 TWh |
| Colusa County, CA | # 20 | 3 | 2.8 TWh |
| Solano County, CA | # 19 | 40 | 3.1 TWh |
| Orange County, CA | # 18 | 58 | 3.2 TWh |
| Tuolumne County, CA | # 17 | 23 | 3.3 TWh |
| Monterey County, CA | # 16 | 29 | 3.7 TWh |
| Butte County, CA | # 15 | 25 | 3.7 TWh |
| Kings County, CA | # 14 | 54 | 3.9 TWh |
| Santa Clara County, CA | # 13 | 73 | 4.3 TWh |
| San Diego County, CA | # 12 | 148 | 5.1 TWh |
| Sonoma County, CA | # 11 | 24 | 5.2 TWh |
| Sacramento County, CA | # 10 | 63 | 6.4 TWh |
| Shasta County, CA | # 9 | 46 | 6.8 TWh |
| Fresno County, CA | # 8 | 104 | 8.4 TWh |
| Imperial County, CA | # 7 | 83 | 10.3 TWh |
| San Bernardino County, CA | # 6 | 196 | 13.3 TWh |
| Contra Costa County, CA | # 5 | 50 | 13.3 TWh |
| Riverside County, CA | # 4 | 158 | 14.0 TWh |
| San Luis Obispo County, CA | # 3 | 20 | 20.5 TWh |
| Los Angeles County, CA | # 2 | 290 | 21.1 TWh |
| Kern County, CA | # 1 | 293 | 32.7 TWh |