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

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Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Oxnard Wastewater Treatment Plant	City of Oxnard - (CA)	Oxnard, CA	3 GWh	Jul 1981	Jul 2026	Other Biomass Gas : 99.9%
Watson Cogeneration	ARCO Products Co-Watson	Carson, CA	2 TWh	Nov 1987	Jul 2026	Natural Gas : 77.0% Other Gas : 22.7%
US Borax	U S Borax Inc	Boron, CA	263 GWh	Jun 1984	Jul 2026	Natural Gas
Calistoga Power Plant	Geysers Power Co LLC	Middletown, CA	454 GWh	Feb 1984	Jul 2026	Geothermal
San Diego State University	San Diego State University	San Diego, CA	59 GWh	Aug 2002	Jul 2026	Natural Gas : 97.5% Solar : 2.5%
Humboldt Sawmill Company	Mendocino Forest Products	Scotia, CA	119 GWh	Dec 1937	Jul 2026	Wood/Wood Waste Solids : 99.8%
Mesquite Solar 2, LLC	RWE Clean Energy	Tonopah, AZ	248 GWh	Nov 2016	Jul 2026	Solar
Mesquite Solar 3, LLC	RWE Clean Energy	Tonopah, AZ	437 GWh	Nov 2016	Jul 2026	Solar
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	316 GWh	Oct 1989	Jul 2026	Geothermal
Coso Finance Partners	Coso Operating Co LLC	Inyokern, CA	357 GWh	Jun 1987	Jul 2026	Geothermal
Willow Spring Solar, LLC	Willow Spring Solar LLC	Rosamond, CA	220 GWh	Dec 2018	Jul 2026	Solar
E F Oxnard Energy Facility	EF Oxnard, LLC	Oxnard, CA	8 GWh	May 1990	Jul 2026	Natural Gas
Argus Cogen Plant	Searles Valley Minerals Operations Inc.	Trona, CA	154 GWh	Nov 1947	Jul 2026	Bituminous Coal : 71.3% Natural Gas : 28.7%
Badger Creek Limited	WCAC Operating Company	Bakersfield, CA	4 GWh	Mar 1991	Jul 2026	Natural Gas
Bear Mountain Limited	WCAC Operating Company	Bakersfield, CA	38 GWh	Mar 1995	Jul 2026	Natural Gas
San Jose Cogeneration	San Jose State University Fclts Dev &Ops	San Jose, CA	35 GWh	Nov 1984	Jul 2026	Natural Gas
Kern River Cogeneration	Kern River Cogeneration Co	Bakersfield, CA	105 GWh	Jun 1985	Jul 2026	Natural Gas
Puente Hills Energy Recovery	Los Angeles County Sanitation	Whittier, CA	145 GWh	Sep 1986	Jul 2026	Landfill Gas
Lockhart Solar PV, LLC	Terra-Gen Operating Co-Solar	Hinkley, CA	236 GWh	Nov 1989	Jul 2026	Solar
White Wing Solar	Leeward Asset Management, LLC	Yuma, AZ	445 GWh	Sep 2024	Jul 2026	Solar
Golden Fields Solar I, LLC	MN8 Energy LLC	Rosamond, CA	136 GWh	Nov 2016	Jul 2026	Solar
New-Indy Ontario Mill	New-Indy Ontario LLC	Ontario, CA	244 GWh	May 1985	Jul 2026	Natural Gas
Solar Star California, XLI, LLC	MN8 Energy LLC	Rosamond, CA	135 GWh	Nov 2016	Jul 2026	Solar
Voyager Wind I	Terra-Gen Operating Co-Wind	Mojave, CA	332 GWh	Nov 2019	Jul 2026	Wind
Marathon Bay Area Cogen	Tesoro Marketing & Refining Co. LLC (Martinez)	Martinez, CA	598 GWh	Jan 1987	Jul 2026	Natural Gas
King City Power Plant	Calpine King City Cogen LLC	King City, CA	28 GWh	Jan 1989	Jul 2026	Natural Gas
California Institute of Technology	California Institute-Technology	Pasadena, CA	74 GWh	Jul 2003	Jul 2026	Natural Gas
Stanton Energy Reliability Center Hybrid	Wellhead Services, Inc	Stanton, CA	2 GWh	Jun 2020	Jul 2026	Natural Gas
American Kings Solar, LLC	MN8 Energy LLC	Lemoore, CA	271 GWh	Nov 2020	Jul 2026	Solar
El Segundo Cogen	Chevron USA Inc-El Segundo	El Segundo, CA	1 TWh	Nov 1987	Jul 2026	Natural Gas : 99.8%
Loma Linda University Cogen	Loma Linda University	Loma Linda, CA	61 GWh	Jan 1980	Jul 2026	Natural Gas
Childrens Hospital	DTE San Diego COGEN Inc.	San Diego, CA	26 GWh	Mar 2000	Jul 2026	Natural Gas
Sun Streams, LLC	EDP Renewables North America LLC	Arlington, AZ	336 GWh	Dec 2019	Jul 2026	Solar
Valentine Solar, LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	267 GWh	Oct 2019	Jul 2026	Solar
Kaweah Delta District Hospital	Kaweah Delta Hospital	Visalia, CA	22 GWh	Sep 2008	Jul 2026	Natural Gas
Encina Water Pollution Control	Encina Joint Powers Authority	Carlsbad, CA	14 GWh	Oct 2008	Jul 2026	Other Biomass Gas : 94.0% Natural Gas : 6.0%
Pine Flat	Kings River Conservation Dist	Piedra, CA	333 GWh	Dec 1983	Jul 2026	Water
Solano Wind	Sacramento Municipal Util Dist	Rio Vista, CA	708 GWh	May 1994	Jul 2026	Wind
Rock Creek	Pacific Gas & Electric Co.	Storrie, CA	438 GWh	Feb 1950	Jul 2026	Water
Poe	Pacific Gas & Electric Co.	Storrie, CA	197 GWh	Sep 1958	Jul 2026	Water
Geysers Unit 5-20	Geysers Power Co LLC	Middletown, CA	4 TWh	Mar 1971	Jul 2026	Geothermal
Belden	Pacific Gas & Electric Co.	Belden, CA	430 GWh	Aug 1969	Jul 2026	Water
Geothermal 2	Northern California Power Agny	Middletown, CA	324 GWh	Nov 1985	Jul 2026	Geothermal
Geothermal 1	Northern California Power Agny	Middletown, CA	307 GWh	Dec 1982	Jul 2026	Geothermal
Maverick Solar, LLC	Maverick Solar, LLC	Desert Center, CA	312 GWh	Nov 2020	Jul 2026	Solar
Desert Harvest, LLC	Desert Harvest, LLC	Desert Center, CA	230 GWh	Nov 2020	Jul 2026	Solar
AES Huntington Beach Energy Project	AES Huntington Beach Energy, LLC	Huntington Beach, CA	2 TWh	Jan 2020	Jul 2026	Natural Gas
AES Alamitos Energy Center	AES Alamitos Energy, LLC	Long Beach, CA	1 TWh	Jan 2020	Jul 2026	Natural Gas
Aratina Solar Center 1B	91MC 8me LLC	Boron, CA	4 GWh	-	Jul 2026	Solar : 93.6% Electricity used for energy storage : 6.4%
Pebbly Beach Generating Station Hybrid	Southern California Edison Co	Avalon, CA	28 GWh	Jun 1958	Jul 2026	Distillate Fuel Oil : 95.4% Gaseous Propane : 4.6%
Pit 7	Pacific Gas & Electric Co.	Montgomery Creek, CA	366 GWh	Aug 1965	Jul 2026	Water
Mount Signal Solar Farm V	Imperial Valley Solar 3, LLC	Calexico, CA	633 GWh	Oct 2018	Jul 2026	Solar
Caribou 2	Pacific Gas & Electric Co.	Belden, CA	491 GWh	Oct 1958	Jul 2026	Water
Big Creek 3	Southern California Edison Co	Auberry, CA	760 GWh	Aug 1923	Jul 2026	Water
Big Creek 4	Southern California Edison Co	North Fork, CA	404 GWh	May 1951	Jul 2026	Water
Strauss Wind Farm	Strauss Wind LLC	Lompoc, CA	192 GWh	Nov 2023	Jul 2026	Wind
Big Creek 2A	Southern California Edison Co	Auberry, CA	325 GWh	Jul 1928	Jul 2026	Water
Pit 5	Pacific Gas & Electric Co.	Big Bend, CA	211 GWh	Mar 1944	Jul 2026	Water
Pit 4	Pacific Gas & Electric Co.	Big Bend, CA	342 GWh	Jun 1955	Jul 2026	Water
Golden Hills North Wind Energy Center	Golden Hills Interconnection Wind, LLC	Livermore, CA	125 GWh	Oct 2017	Jul 2026	Wind
Diablo Canyon	Pacific Gas & Electric Co.	Avila Beach, CA	18 TWh	Apr 1985	Jul 2026	Nuclear
Little Bear 4	Little Bear Solar 4, LLC (Longroad)	Mendota, CA	41 GWh	Nov 2020	Jul 2026	Solar
Antelope Expansion 2	AES Distributed Energy	Lancaster, CA	214 GWh	Nov 2018	Jul 2026	Solar
Mount Signal Solar Farm II	MN8 Energy LLC	Calexico, CA	358 GWh	Dec 2019	Jul 2026	Solar
Little Bear 5	Little Bear Solar 5, LLC (Longroad)	Mendota, CA	106 GWh	Nov 2020	Jul 2026	Solar
Kerckhoff 2	Pacific Gas & Electric Co.	Auberry, CA	450 GWh	Apr 1983	Jul 2026	Water
San Pablo Raceway	AES Distributed Energy	Lancaster, CA	197 GWh	Jul 2019	Jul 2026	Solar
Aquamarine	Aqua	Lemoore, CA	645 GWh	Aug 2021	Jul 2026	Solar
Dynegy Moss Landing Power Plant Hybrid	Dynegy -Moss Landing LLC	Moss Landing, CA	2 TWh	Nov 1967	Jul 2026	Natural Gas
Mammoth Pool	Southern California Edison Co	North Fork, CA	574 GWh	Feb 1960	Jul 2026	Water
Ormond Beach	Ormond Beach Power, LLC	Oxnard, CA	18 GWh	Jul 1971	Jul 2026	Natural Gas
RE Gaskell West 2 LLC	RE Gaskell West LLC	Rosamond, CA	123 GWh	Apr 2023	Jul 2026	Solar
James B Black	Pacific Gas & Electric Co.	Big Bend, CA	504 GWh	Nov 1965	Jul 2026	Water
Humboldt Bay	Pacific Gas & Electric Co.	Eureka, CA	312 GWh	Aug 2010	Jul 2026	Natural Gas : 99.4% Distillate Fuel Oil : 0.6%
Mountainview Generating Station	Southern California Edison Co	Redlands, CA	1 TWh	Nov 2005	Jul 2026	Natural Gas
Thermalito	California Dept. of Water Resources	Oroville, CA	309 GWh	Jan 1968	Jul 2026	Water
Edward C Hyatt	California Dept. of Water Resources	Oroville, CA	2 TWh	Feb 1968	Jul 2026	Water
Devil Canyon	California Dept. of Water Resources	San Bernardino, CA	736 GWh	Nov 1972	Jul 2026	Water
Middle Fork	Placer County Water Agency - (CA)	Foresthill, CA	459 GWh	Sep 1966	Jul 2026	Water
Voyager Wind II	Terra-Gen Operating Co-Wind	Mojave, CA	419 GWh	Nov 2018	Jul 2026	Wind
Voyager Wind III	Terra-Gen Operating Co-Wind	Mojave, CA	117 GWh	Nov 2018	Jul 2026	Wind
Dion R Holm	City & County of San Francisco - (CA)	Groveland, CA	552 GWh	Jul 1960	Jul 2026	Water
Moccasin	City & County of San Francisco - (CA)	Moccasin, CA	305 GWh	Jul 1969	Jul 2026	Water
R C Kirkwood	City & County of San Francisco - (CA)	Groveland, CA	478 GWh	Jan 1967	Jul 2026	Water
Haas	Pacific Gas & Electric Co.	Balch Camp, CA	174 GWh	Nov 1958	Jul 2026	Water
Wistaria Ranch Solar	RWE Clean Energy	Calexico, CA	268 GWh	Nov 2018	Jul 2026	Solar
Electra	Pacific Gas & Electric Co.	Jackson, CA	257 GWh	May 1948	Jul 2026	Water
Greenleaf 2 Power Plant	Greenleaf Energy LLC	Yuba City, CA	64 GWh	Sep 1989	Jun 2026	Natural Gas
AES Alamitos LLC	AES Alamitos LLC	Long Beach, CA	13 GWh	Aug 1956	Jun 2026	Natural Gas
Chalk Cliff Limited	WCAC Operating Company	Bakersfield, CA	3 GWh	Feb 1990	Jun 2026	Natural Gas
Sycamore Cogeneration	Sycamore Cogeneration Co	Bakersfield, CA	144 GWh	Nov 1987	Jun 2026	Natural Gas
AES Huntington Beach LLC	AES Huntington Beach LLC	Huntington Beach, CA	5 GWh	May 1958	Jun 2026	Natural Gas
PE Berkeley	Berkeley Cogeneration Facility	Berkeley, CA	134 GWh	May 1987	Jun 2026	Natural Gas
Big Creek Water Works	Big Creek Water Works Ltd	Hyampom, CA	6 GWh	Dec 1986	May 2026	Water
Berry Cogen	Berry Petroleum Co	Taft, CA	9 GWh	Nov 1986	May 2026	Natural Gas
Dynegy Oakland Power Plant	Dynegy Oakland, LLC	Oakland, CA	2 GWh	Oct 1978	May 2026	Jet Fuel
Mustang Two	RE Mustang Two LLC	Lemoore, CA	373 GWh	Oct 2020	Apr 2026	Solar
Valero Refinery Cogeneration Unit 1	Valero Refining Co California	Benicia, CA	237 GWh	Sep 2002	Feb 2026	Natural Gas : 85.2% Other Gas : 14.8%
Crockett Cogen Project	Crockett Cogeneration	Crockett, CA	1 TWh	Nov 1995	Feb 2026	Natural Gas
Antelope Expansion 1B	AES Distributed Energy	Lancaster, CA	47 GWh	Oct 2022	Dec 2025	Solar

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