California Independent System Operator
Balancing Authority Summary Information
California Independent System Operator is ranked #7 out of 64 balancing authorities in terms of total annual electricity generation.
| Balancing Authority | California Independent System Operator |
|---|---|
| States | Arizona California Nevada New Mexico |
| Last Update | Oct 2026 |
| Annual Generation | 168.7 TWh |
| Power Plants | 2,170 |
| Utilities | 1,001 |
| Ranked #7 out of 64 in terms of net annual generation | |
| Ranked #14 out of 53 in terms of annual generation from natural gas | |
| Power Plant Types | Natural Gas | 32% Solar | 30.9% Water | 12.2% Wind | 11.8% Nuclear | 11.2% Coal | 0% |
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Daily Net Generation for California Independent System Operator for the past 3 Years
| Plant Name | Utility | Location | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|
| Topaz Solar Farm | Topaz Solar Farms LLC | Santa Margarita, CA | 974 GWh | Mar 2013 | Jul 2026 | Solar |
| Palomar Energy | San Diego Gas & Electric Co | Escondido, CA | 1 TWh | Sep 2005 | Jul 2026 | Natural Gas |
| AES Alamitos Energy Center | AES Alamitos Energy, LLC | Long Beach, CA | 1 TWh | Jan 2020 | Jul 2026 | Natural Gas |
| El Segundo Cogen | Chevron USA Inc-El Segundo | El Segundo, CA | 1 TWh | Nov 1987 | Jul 2026 | Natural Gas : 99.8% |
| Mountainview Generating Station | Southern California Edison Co | Redlands, CA | 1 TWh | Nov 2005 | Jul 2026 | Natural Gas |
| La Paloma Generating Plant | CXA La Paloma LLC | McKittrick, CA | 1 TWh | Dec 2002 | Jul 2026 | Natural Gas |
| Otay Mesa Generating Project | Otay Mesa Energy Center LLC | San Diego, CA | 1 TWh | Sep 2009 | Jul 2026 | Natural Gas |
| Crockett Cogen Project | Crockett Cogeneration | Crockett, CA | 1 TWh | Nov 1995 | Feb 2026 | Natural Gas |
| Colgate | Yuba County Water Agency - (CA) | Dobbins, CA | 1 TWh | Sep 1969 | Oct 2025 | Water |
| AES Huntington Beach Energy Project | AES Huntington Beach Energy, LLC | Huntington Beach, CA | 2 TWh | Jan 2020 | Jul 2026 | Natural Gas |
| Russell City Energy Center | Russell City Energy Company LLC | Hayward, CA | 2 TWh | Jul 2013 | Jul 2026 | Natural Gas |
| SunZia Wind South | Pattern Operators LP | Corona, NM | 2 TWh | - | Jul 2026 | Wind |
| Metcalf Energy Center | Calpine Corp - Metcalf Energy Center | San Jose, CA | 2 TWh | May 2005 | Jul 2026 | Natural Gas |
| Colusa Generating Station | Pacific Gas & Electric Co. | Maxwell, CA | 2 TWh | Nov 2010 | Jul 2026 | Natural Gas |
| Edward C Hyatt | California Dept. of Water Resources | Oroville, CA | 2 TWh | Feb 1968 | Jul 2026 | Water |
| Dynegy Moss Landing Power Plant Hybrid | Dynegy -Moss Landing LLC | Moss Landing, CA | 2 TWh | Nov 1967 | Jul 2026 | Natural Gas |
| Sunrise Power LLC | Sunrise Power Co LLC | Fellows, CA | 2 TWh | May 2001 | Jul 2026 | Natural Gas |
| Gateway Generating Station | Pacific Gas & Electric Co. | Antioch, CA | 2 TWh | Dec 2008 | Jul 2026 | Natural Gas |
| Watson Cogeneration | ARCO Products Co-Watson | Carson, CA | 2 TWh | Nov 1987 | Jul 2026 | Natural Gas : 77.0% Other Gas : 22.7% |
| Los Medanos Energy Center | Los Medanos Energy Center LLC | Pittsburg, CA | 3 TWh | Jul 2001 | Jul 2026 | Natural Gas |
| Elk Hills Power LLC | Elk Hills Power LLC | Tupman, CA | 3 TWh | Jun 2003 | Jul 2026 | Natural Gas |
| Pastoria Energy Facility, LLC | Calpine Corp - Pastoria Energy Center | Lebec, CA | 3 TWh | Apr 2005 | Jul 2026 | Natural Gas |
| High Desert Power Plant | MRP Generation Holdings, LLC | Victorville, CA | 3 TWh | Mar 2003 | Jul 2026 | Natural Gas |
| Delta Energy Center | Delta Energy Center LLC | Pittsburg, CA | 3 TWh | Apr 2002 | Jul 2026 | Natural Gas |
| Geysers Unit 5-20 | Geysers Power Co LLC | Middletown, CA | 4 TWh | Mar 1971 | Jul 2026 | Geothermal |
| Diablo Canyon | Pacific Gas & Electric Co. | Avila Beach, CA | 18 TWh | Apr 1985 | Jul 2026 | Nuclear |
Surrounding Balancing Authorities
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #25 | Arizona Public Service Company | 25.8 TWh | 102 |
| #55 | Arlington Valley, LLC | 3.2 TWh | 1 |
| #38 | Balancing Authority of Northern California | 13.9 TWh | 91 |
| #49 | Imperial Irrigation District | 6.2 TWh | 66 |
| #29 | Los Angeles Department of Water and Power | 19.3 TWh | 132 |
| #22 | Nevada Power Company | 38.6 TWh | 143 |
| #51 | PUD No. 1 of Douglas County | 4.4 TWh | 5 |
| #19 | Salt River Project Agricultural Improvement and Power District | 60.5 TWh | 51 |
| #57 | Turlock Irrigation District | 1.9 TWh | 11 |
| #39 | Western Area Power Administration - Desert Southwest Region | 10.6 TWh | 36 |
Balancing Authorities with Similar Net Generation
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #3 | Electric Reliability Council of Texas, Inc. | 506.3 TWh | 1,487 |
| #5 | Southwest Power Pool | 314.5 TWh | 876 |
| #6 | Southern Company Services, Inc. - Trans | 259.3 TWh | 423 |
| #7 | California Independent System Operator | 168.7 TWh | 2,170 |
| #9 | Tennessee Valley Authority | 166.2 TWh | 209 |
| #10 | Florida Power & Light Co. | 153.0 TWh | 188 |
| #12 | New York Independent System Operator | 134.1 TWh | 1,334 |
| #13 | Duke Energy Carolinas | 113.4 TWh | 578 |
| #15 | ISO New England | 112.2 TWh | 1,667 |
| #16 | Bonneville Power Administration | 91.1 TWh | 170 |