California Independent System Operator

Balancing Authority Summary Information

California Independent System Operator is ranked #7 out of 65 balancing authorities in terms of total annual electricity generation.

Balancing Authority	California Independent System Operator
States	Arizona California Nevada
Last Update	Apr 2026
Annual Generation	176.8 TWh
Power Plants	2,075
Utilities	965
Ranked #7 out of 65 in terms of net annual generation
Ranked #10 out of 54 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 38.5% Solar \| 28.7% Water \| 12.1% Wind \| 10.2% Nuclear \| 10.1%

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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
Big Creek Water Works	Big Creek Water Works Ltd	Hyampom, CA	8 GWh	Dec 1986	Feb 2026	Water
California Institute of Technology	California Institute-Technology	Pasadena, CA	52 GWh	Jul 2003	Feb 2026	Natural Gas
El Segundo Cogen	Chevron USA Inc-El Segundo	El Segundo, CA	1 TWh	Nov 1987	Feb 2026	Natural Gas : 99.7%
Loma Linda University Cogen	Loma Linda University	Loma Linda, CA	62 GWh	Jan 1980	Feb 2026	Natural Gas
Childrens Hospital	DTE San Diego COGEN Inc.	San Diego, CA	26 GWh	Mar 2000	Feb 2026	Natural Gas : 99.9%
Mesquite Solar 2, LLC	Consolidated Edison Development Inc.	Tonopah, AZ	288 GWh	Nov 2016	Feb 2026	Solar
Mesquite Solar 3, LLC	Consolidated Edison Development Inc.	Tonopah, AZ	441 GWh	Nov 2016	Feb 2026	Solar
Willow Spring Solar, LLC	Willow Spring Solar LLC	Rosamond, CA	244 GWh	Dec 2018	Feb 2026	Solar
Kaweah Delta District Hospital	Kaweah Delta Hospital	Visalia, CA	22 GWh	Sep 2008	Feb 2026	Natural Gas
Encina Water Pollution Control	Encina Joint Powers Authority	Carlsbad, CA	14 GWh	Oct 2008	Feb 2026	Other Biomass Gas : 93.7% Natural Gas : 6.3%
Solano Wind	Sacramento Municipal Util Dist	Rio Vista, CA	742 GWh	May 1994	Feb 2026	Wind
Little Bear 5	Little Bear Solar 5, LLC (Longroad)	Mendota, CA	107 GWh	Nov 2020	Feb 2026	Solar
Geysers Unit 5-20	Geysers Power Co LLC	Middletown, CA	4 TWh	Mar 1971	Feb 2026	Geothermal
Little Bear 4	Little Bear Solar 4, LLC (Longroad)	Mendota, CA	37 GWh	Nov 2020	Feb 2026	Solar
Geothermal 2	Northern California Power Agny	Middletown, CA	328 GWh	Nov 1985	Feb 2026	Geothermal
Wistaria Ranch Solar	Consolidated Edison Development Inc.	Calexico, CA	288 GWh	Nov 2018	Feb 2026	Solar
Geothermal 1	Northern California Power Agny	Middletown, CA	319 GWh	Dec 1982	Feb 2026	Geothermal
Belden	Pacific Gas & Electric Co.	Belden, CA	347 GWh	Aug 1969	Feb 2026	Water
White Wing Solar	Leeward Asset Management, LLC	Yuma, AZ	445 GWh	Sep 2024	Feb 2026	Solar
Golden Fields Solar I, LLC	MN8 Energy LLC	Rosamond, CA	134 GWh	Nov 2016	Feb 2026	Solar
Solar Star California, XLI, LLC	MN8 Energy LLC	Rosamond, CA	143 GWh	Nov 2016	Feb 2026	Solar
Voyager Wind I	Terra-Gen Operating Co-Wind	Mojave, CA	365 GWh	Nov 2019	Feb 2026	Wind
Stanton Energy Reliability Center Hybrid	Wellhead Services, Inc	Stanton, CA	2 GWh	Jun 2020	Feb 2026	Natural Gas
Pebbly Beach Generating Station Hybrid	Southern California Edison Co	Avalon, CA	28 GWh	Jun 1958	Feb 2026	Distillate Fuel Oil : 94.9% Gaseous Propane : 5.1%
American Kings Solar, LLC	MN8 Energy LLC	Lemoore, CA	315 GWh	Nov 2020	Feb 2026	Solar
Dynegy Oakland Power Plant	Dynegy Oakland, LLC	Oakland, CA	1 GWh	Oct 1978	Feb 2026	Jet Fuel
Rock Creek	Pacific Gas & Electric Co.	Storrie, CA	577 GWh	Feb 1950	Feb 2026	Water
Diablo Canyon	Pacific Gas & Electric Co.	Avila Beach, CA	17 TWh	Apr 1985	Feb 2026	Nuclear
Sun Streams, LLC	EDP Renewables North America LLC	Arlington, AZ	410 GWh	Dec 2019	Feb 2026	Solar
Pit 7	Pacific Gas & Electric Co.	Montgomery Creek, CA	417 GWh	Aug 1965	Feb 2026	Water
Caribou 2	Pacific Gas & Electric Co.	Belden, CA	476 GWh	Oct 1958	Feb 2026	Water
Big Creek 3	Southern California Edison Co	Auberry, CA	756 GWh	Aug 1923	Feb 2026	Water
Pit 5	Pacific Gas & Electric Co.	Big Bend, CA	456 GWh	Mar 1944	Feb 2026	Water
Pit 4	Pacific Gas & Electric Co.	Big Bend, CA	412 GWh	Jun 1955	Feb 2026	Water
Kerckhoff 2	Pacific Gas & Electric Co.	Auberry, CA	471 GWh	Apr 1983	Feb 2026	Water
Valentine Solar, LLC	EDF Renewable Asset Holdings, Inc.	Rosamond, CA	284 GWh	Oct 2019	Feb 2026	Solar
Big Creek 4	Southern California Edison Co	North Fork, CA	398 GWh	May 1951	Feb 2026	Water
Big Creek 2A	Southern California Edison Co	Auberry, CA	284 GWh	Jul 1928	Feb 2026	Water
Voyager Wind III	Terra-Gen Operating Co-Wind	Mojave, CA	125 GWh	Nov 2018	Feb 2026	Wind
Voyager Wind II	Terra-Gen Operating Co-Wind	Mojave, CA	450 GWh	Nov 2018	Feb 2026	Wind
San Pablo Raceway	AES Distributed Energy	Lancaster, CA	237 GWh	Jul 2019	Feb 2026	Solar
Thermalito	California Dept. of Water Resources	Oroville, CA	330 GWh	Jan 1968	Feb 2026	Water
Edward C Hyatt	California Dept. of Water Resources	Oroville, CA	2 TWh	Feb 1968	Feb 2026	Water
Devil Canyon	California Dept. of Water Resources	San Bernardino, CA	834 GWh	Nov 1972	Feb 2026	Water
Mustang Two	RE Mustang Two LLC	Lemoore, CA	390 GWh	Oct 2020	Feb 2026	Solar
RE Gaskell West 2 LLC	RE Gaskell West LLC	Rosamond, CA	110 GWh	Apr 2023	Feb 2026	Solar
Middle Fork	Placer County Water Agency	Foresthill, CA	425 GWh	Sep 1966	Feb 2026	Water
Mount Signal Solar Farm V	Imperial Valley Solar 3, LLC	Calexico, CA	674 GWh	Oct 2018	Feb 2026	Solar
Maverick Solar, LLC	Maverick Solar, LLC	Desert Center, CA	367 GWh	Nov 2020	Feb 2026	Solar
Desert Harvest, LLC	Desert Harvest, LLC	Desert Center, CA	231 GWh	Nov 2020	Feb 2026	Solar
Golden Hills North Wind Energy Center	Golden Hills Interconnection Wind, LLC	Livermore, CA	137 GWh	Oct 2017	Feb 2026	Wind
Antelope Expansion 2	AES Distributed Energy	Lancaster, CA	257 GWh	Nov 2018	Feb 2026	Solar
Dynegy Moss Landing Power Plant Hybrid	Dynegy -Moss Landing LLC	Moss Landing, CA	2 TWh	Nov 1967	Feb 2026	Natural Gas
Mammoth Pool	Southern California Edison Co	North Fork, CA	538 GWh	Feb 1960	Feb 2026	Water
Mount Signal Solar Farm II	MN8 Energy LLC	Calexico, CA	402 GWh	Dec 2019	Feb 2026	Solar
Electra	Pacific Gas & Electric Co.	Jackson, CA	311 GWh	May 1948	Feb 2026	Water
R C Kirkwood	City & County of San Francisco	Groveland, CA	462 GWh	Jan 1967	Feb 2026	Water
Moccasin	City & County of San Francisco	Moccasin, CA	290 GWh	Jul 1969	Feb 2026	Water
Dion R Holm	City & County of San Francisco	Groveland, CA	594 GWh	Jul 1960	Feb 2026	Water
Strauss Wind Farm	Strauss Wind LLC	Lompoc, CA	213 GWh	Nov 2023	Feb 2026	Wind
AES Huntington Beach Energy Project	AES Huntington Beach Energy, LLC	Huntington Beach, CA	2 TWh	Jan 2020	Feb 2026	Natural Gas
James B Black	Pacific Gas & Electric Co.	Big Bend, CA	604 GWh	Nov 1965	Feb 2026	Water
Humboldt Bay	Pacific Gas & Electric Co.	Eureka, CA	343 GWh	Aug 2010	Feb 2026	Natural Gas : 99.6%
AES Alamitos Energy Center	AES Alamitos Energy, LLC	Long Beach, CA	1 TWh	Jan 2020	Feb 2026	Natural Gas
Mountainview Generating Station	Southern California Edison Co	Redlands, CA	1 TWh	Nov 2005	Feb 2026	Natural Gas
Malaga Power LLC	CalPeak Power, LLC	Fresno, CA	8 GWh	Aug 2005	Jan 2026	Natural Gas
Bear Mountain Limited	WCAC Operating Company	Bakersfield, CA	36 GWh	Mar 1995	Jan 2026	Natural Gas
High Desert Power Plant	MRP Generation Holdings, LLC	Victorville, CA	3 TWh	Mar 2003	Jan 2026	Natural Gas
Chalk Cliff Limited	WCAC Operating Company	Bakersfield, CA	3 GWh	Feb 1990	Jan 2026	Natural Gas
Goal Line LP	Goal Line LP	Escondido, CA	9 GWh	Jul 1994	Jan 2026	Natural Gas
Ivanpah 1	NRG Energy Services	Nipton, CA	198 GWh	Nov 2013	Jan 2026	Solar : 96.2% Natural Gas : 3.8%
McKittrick Limited	WCAC Operating Company	Bakersfield, CA	5 GWh	Sep 1991	Jan 2026	Natural Gas
Haas	Pacific Gas & Electric Co.	Balch Camp, CA	183 GWh	Nov 1958	Jan 2026	Water
Naval Hospital Medical Center	Department of the Navy	San Diego, CA	23 GWh	Nov 2003	Jan 2026	Natural Gas
Poe	Pacific Gas & Electric Co.	Storrie, CA	361 GWh	Sep 1958	Dec 2025	Water
El Segundo Energy Center LLC	NRG Energy Services LLC	El Segundo, CA	45 GWh	Jun 2013	Dec 2025	Natural Gas
E F Oxnard Energy Facility	EF Oxnard, LLC	Oxnard, CA	5 GWh	May 1990	Dec 2025	Natural Gas
Blythe Energy Inc	AltaGas Blythe Operations Inc	Blythe, CA	315 GWh	Nov 2003	Dec 2025	Natural Gas
Algonquin Power Sanger LLC	Algonquin Power Sanger LLC	Sanger, CA	4 GWh	Nov 2007	Dec 2025	Natural Gas
Midway Sunset Cogen	Midway-Sunset Cogeneration Co	Fellows, CA	47 GWh	Apr 1989	Dec 2025	Natural Gas
Sycamore Cogeneration	Sycamore Cogeneration Co	Bakersfield, CA	219 GWh	Nov 1987	Nov 2025	Natural Gas
Western Power & Steam Inc	Western Power and Steam II LLC	Bakersfield, CA	27 GWh	Feb 1990	Nov 2025	Natural Gas
Henrietta Peaker	MRP San Joaquin Energy LLC.	Lemoore, CA	4 GWh	May 2002	Oct 2025	Natural Gas
AES Alamitos LLC	AES Alamitos LLC	Long Beach, CA	28 GWh	Aug 1956	Oct 2025	Natural Gas
AES Huntington Beach LLC	AES Huntington Beach LLC	Huntington Beach, CA	6 GWh	May 1958	Oct 2025	Natural Gas
Colgate	Yuba County Water Agency	Dobbins, CA	1 TWh	Sep 1969	Oct 2025	Water
Pine Flat	Kings River Conservation Dist	Piedra, CA	331 GWh	Dec 1983	Sep 2025	Water
Hanford Energy Park Peaker	MRP San Joaquin Energy LLC.	Hanford, CA	6 GWh	Aug 2001	Sep 2025	Natural Gas
Berry Cogen	Berry Petroleum Co	Taft, CA	8 GWh	Nov 1986	Sep 2025	Natural Gas
Ormond Beach	Ormond Beach Power, LLC	Oxnard, CA	43 GWh	Jul 1971	Aug 2025	Natural Gas
Irwindale Brew Yard, LLC	Irwindale Brew Yard, LLC	Irwindale, CA	517 MWh	Jan 2002	Apr 2025	Solar : 99.8%
Westlands Solar PV Farm	Boralex US Operations LLC	Huron, CA	34 GWh	Jan 2014	Dec 2024	Solar
National Raisin	National Raisin	Fowler, CA	5 GWh	May 2015	Dec 2024	Solar
Rising Tree Wind Farm III	Rising Tree Wind Farm III LLC	Mojave, CA	261 GWh	May 2015	Dec 2024	Wind
Rising Tree Wind Farm II	Rising Tree Wind Farm II LLC	Mojave, CA	59 GWh	Dec 2014	Dec 2024	Wind
Porterville 6 and 7	Arevon Energy, Inc.	Porterville, CA	3 GWh	Jun 2014	Dec 2024	Solar
Farmersville	Arevon Energy, Inc.	Farmersville, CA	7 GWh	Jun 2014	Dec 2024	Solar
CID Solar, LLC	Onward Energy	Corcoran, CA	45 GWh	Nov 2014	Dec 2024	Solar
Hesperia	SunEdison LLC	Hesperia, CA	3 GWh	Jul 2014	Dec 2024	Solar
Lancaster Solar 2	Boralex US Operations LLC	Lancaster, CA	3 GWh	Oct 2014	Dec 2024	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#26	Arizona Public Service Company	24.6 TWh	92
#54	Arlington Valley, LLC	3.3 TWh	1
#37	Balancing Authority of Northern California	14.1 TWh	87
#48	Imperial Irrigation District	6.3 TWh	66
#30	Los Angeles Department of Water and Power	18.4 TWh	124
#22	Nevada Power Company	36.8 TWh	139
#64	New Harquahala Generating Company, LLC	32.9 GWh	1
#19	Salt River Project Agricultural Improvement and Power District	60.0 TWh	48
#57	Turlock Irrigation District	2.0 TWh	11
#39	Western Area Power Administration - Desert Southwest Region	10.3 TWh	33

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	488.2 TWh	1,313
#5	Southwest Power Pool	302.9 TWh	835
#6	Southern Company Services, Inc. - Trans	250.9 TWh	417
#7	California Independent System Operator	176.8 TWh	2,075
#9	Tennessee Valley Authority	163.1 TWh	204
#10	Florida Power & Light Co.	150.9 TWh	187
#12	New York Independent System Operator	134.4 TWh	1,211
#13	Duke Energy Carolinas	112.5 TWh	565
#15	ISO New England	111.1 TWh	1,577
#16	Bonneville Power Administration	88.3 TWh	163