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	Jun 2025
Annual Generation	190.4 TWh
Power Plants	1,943
Utilities	893
Ranked #7 out of 65 in terms of net annual generation
Ranked #7 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 44% Solar \| 24.9% Water \| 11.3% Wind \| 10.6% Nuclear \| 9.7%

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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
Dutch Flat	Pacific Gas & Electric Co.	Alta, CA	112 GWh	Feb 1943	Dec 2023	Water
SEGS IX	Terra-Gen Operating Co-Solar	Hinkley, CA	112 GWh	Aug 1990	Sep 2024	Solar
UCI Facilities Management Central Plant	University of California Irvine	Irvine, CA	112 GWh	Jun 2007	Mar 2025	Natural Gas
Humboldt Sawmill Company	Mendocino Forest Products	Scotia, CA	111 GWh	Dec 1937	Mar 2025	Wood/Wood Waste Solids : 99.7%
Borden Solar Farm	41MB 8me, LLC	Madera, CA	108 GWh	May 2020	Mar 2025	Solar
Friant Hydro Facility	Friant Power Authority	Friant, CA	106 GWh	Mar 1985	Dec 2023	Water
Mammoth G3	Ormat Nevada Inc	Mammoth Lakes, CA	104 GWh	Nov 1990	Dec 2023	Geothermal
Five Points Solar Park	Five Points Solar Park, LLC	Five Points, CA	102 GWh	Aug 2016	Dec 2023	Solar
RE Gaskell West 2 LLC	RE Gaskell West LLC	Rosamond, CA	101 GWh	Apr 2023	Mar 2025	Solar
El Dorado	El Dorado Irrigation District	Pollock Pines, CA	101 GWh	Dec 1923	Dec 2023	Water
Pio Pico Energy Center	Pio Pico Energy Center LLC	San Diego, CA	100 GWh	Oct 2016	Dec 2023	Natural Gas
Elevation Solar C	AES Distributed Energy	Lancaster, CA	100 GWh	Nov 2016	Mar 2025	Solar
FPL Energy Montezuma Winds LLC	FPL Energy Montezuma Wind	Birds Landing, CA	98 GWh	Oct 2010	Dec 2023	Wind
Sierra Pacific Burney Facility	Sierra Pacific Industries	Burney, CA	94 GWh	Sep 1986	Dec 2023	Wood/Wood Waste Solids
CM48	Consolidated Edison Development Inc.	Boulder City, NV	93 GWh	May 2010	Dec 2023	Solar
Edwards Sanborn S1	Terra-Gen Operating Co-Hybrid	Mojave, CA	93 GWh	Feb 2022	Mar 2025	Solar
Sandrini Solar 100	EDPR CA Solar Park II LLC	Mettler, CA	92 GWh	-	Mar 2025	Solar
Alamo	California Dept. of Water Resources	Pearblossom, CA	91 GWh	Jun 1986	Dec 2023	Water
Buena Vista Energy LLC	Leeward Asset Management, LLC	Byron, CA	91 GWh	Nov 2006	Dec 2023	Wind
Southeast Resource Recovery	SERRF Joint Powers Authority	Long Beach, CA	90 GWh	Jun 1988	Mar 2024	Non-biogenic Municipal Solid Waste : 51.7% Biogenic Municipal Solid Waste : 42.3% Natural Gas : 6.1%
Drum 1	Pacific Gas & Electric Co.	Alta, CA	88 GWh	Oct 1913	Dec 2023	Water
Sierra Pacific Lincoln Facility	Sierra Pacific Industries	Lincoln, CA	88 GWh	Feb 2004	Dec 2023	Wood/Wood Waste Solids
Little Bear Solar 1, LLC	Little Bear Solar 1, LLC (Longroad)	Mendota, CA	87 GWh	Nov 2020	Mar 2025	Solar
85 B	Wind Wall 1 LLC	Tehachapi, CA	87 GWh	Dec 1984	Dec 2023	Wind
Mojave 3/4/5	Terra-Gen Operating Co-Wind	Mojave, CA	83 GWh	Nov 1990	Dec 2023	Wind
Mesa Wind Repower	Mesa Wind Repower	Whitewater, CA	83 GWh	-	Mar 2025	Wind
Muck Valley Hydroelectric	Brookfield Renewable Trading and Marketing LP	NA, CA	83 GWh	Nov 1988	Dec 2023	Water
Beardsley	Oakdale&South San Joaquin Irrigation D.	None, CA	83 GWh	Apr 1957	Dec 2023	Water
West Point PH	Pacific Gas & Electric Co.	Pioneer, CA	82 GWh	Oct 1948	Dec 2023	Water
Edwards Sanborn S3	Terra-Gen Operating Co-Hybrid	Mojave, CA	81 GWh	Feb 2022	Mar 2025	Solar
Ameresco Ox Mountain	AMERESCO Ox Mountain Energy LLC	Half Moon Bay, CA	81 GWh	Nov 2008	Mar 2025	Landfill Gas
Scarlet II Hybrid	EDPR Scarlet II LLC	Cantua Creek, CA	81 GWh	-	Mar 2025	Solar
Aidlin Geothermal Power Plant	Geysers Power Co LLC	Middletown, CA	77 GWh	Apr 1989	Dec 2023	Geothermal
Edwards Sanborn S4	Terra-Gen Operating Co-Hybrid	Mojave, CA	77 GWh	Oct 2022	Mar 2025	Solar
Lost Hills/Blackwell	Southern Power Co	Lost Hills, CA	77 GWh	Mar 2015	Dec 2023	Solar
SJ/SC WPCP	San Jose/Santa Clara Water P C	San Jose, CA	77 GWh	Jan 1953	Mar 2025	Other Biomass Gas : 50.0% Natural Gas : 49.9%
Rexford Solar Farm	AES Clean Energy	Ducor, CA	76 GWh	-	Mar 2025	Solar
AES Huntington Beach LLC	AES Huntington Beach LLC	Huntington Beach, CA	76 GWh	May 1958	Sep 2024	Natural Gas
Baldy Mesa Solar & Storage	AES Clean Energy	Adelanto, CA	76 GWh	-	Mar 2025	Solar : 99.8%
CP Kelco San Diego Plant	CP Kelco US Inc.	San Diego, CA	76 GWh	Sep 1983	Mar 2025	Natural Gas
Sandrini Solar 200	EDPR CA Solar Park LLC	Mettler, CA	75 GWh	-	Mar 2025	Solar
Torrance Refining Company, LLC	Torrance Refining Company, LLC	Torrance, CA	75 GWh	Aug 1983	Mar 2025	Other Gas : 80.9% Waste Heat : 19.1%
Gilroy Power Plant	Calpine Gilroy Cogen LP	Gilroy, CA	75 GWh	Sep 1987	Nov 2023	Natural Gas
Wadham Energy LP	Wadham Energy Ltd Partners	Williams, CA	74 GWh	Feb 1989	Dec 2023	Agricultural By-Products : 99.5% Natural Gas : 0.5%
Mariposa Energy Project	Diamond Generating Corporation	Byron, CA	74 GWh	Sep 2012	Mar 2025	Natural Gas
Narrows PH	Yuba County Water Agency	Grass Valley, CA	73 GWh	Nov 1942	Dec 2023	Water
Rollins	Nevada Irrigation District	Colfax, CA	73 GWh	Jul 1980	Dec 2023	Water
Berry NMW Cogens	Berry Petroleum Co	Bakersfield, CA	72 GWh	Oct 2017	Dec 2023	Natural Gas
Alpaugh 50	Consolidated Edison Development Inc.	Alpaugh, CA	72 GWh	Nov 2012	Dec 2023	Solar
Voyager Wind IV	Terra-Gen Operating Co-Wind	Mojave, CA	70 GWh	Nov 2018	Dec 2023	Wind
Mojave Siphon	California Dept. of Water Resources	Hesperia, CA	70 GWh	Jul 1996	Dec 2023	Water
Parnassus Central Utility Plant	University of California-San Francisco	San Francisco, CA	69 GWh	Dec 1995	Mar 2025	Natural Gas
Mountain View III	Avangrid Renewables LLC	North Palm Springs, CA	69 GWh	Nov 2003	Dec 2023	Wind
Chevron - Lost Hills Hybrid	MN8 Energy LLC	Lost Hills, CA	68 GWh	Mar 2020	Mar 2025	Solar
French Meadows	Placer County Water Agency	Foresthill, CA	67 GWh	Sep 1966	Dec 2023	Water
Coalinga 25D Cogen	Chevron USA Inc	Coalinga, CA	67 GWh	Sep 1986	Dec 2023	Natural Gas
Kelly Ridge	South Feather Water and Power Agency	Oroville, CA	65 GWh	Aug 1963	Dec 2023	Water
Wise	Pacific Gas & Electric Co.	Auburn, CA	65 GWh	Feb 1917	Dec 2023	Water
Solar Borrego I	NRG Solar Borrego I	Borrego Springs, CA	65 GWh	Jan 2013	Dec 2023	Solar
Central 40	Central 40, LLC	Newman, CA	64 GWh	Jan 2021	Mar 2025	Solar
Canyon Power Plant	City of Anaheim - (CA)	Anaheim, CA	64 GWh	Jul 2011	Mar 2025	Natural Gas
85 A	Wind Wall 1 LLC	Tehachapi, CA	63 GWh	Dec 1984	Dec 2023	Wind
McFarland B Solar and Storage	AES Clean Energy	Dateland, AZ	63 GWh	-	Mar 2025	Solar
Mammoth G2	Ormat Nevada Inc	Mammoth Lakes, CA	62 GWh	Nov 1990	Dec 2023	Geothermal
Covanta Stanislaus Energy	Covanta Stanislaus Inc	Crows Landing, CA	62 GWh	Aug 1988	Dec 2024	Non-biogenic Municipal Solid Waste : 50.0% Biogenic Municipal Solid Waste : 40.9% Distillate Fuel Oil : 9.1%
San Gorgonio Farms Wind Farm	San Gorgonio Farms Inc	Whitewater, CA	62 GWh	Feb 1983	Dec 2023	Wind
Loma Linda University Cogen	Loma Linda University	Loma Linda, CA	62 GWh	Jan 1980	Mar 2025	Natural Gas
Terminus Hydroelectric Project	Eagle Creek Renewable Energy, LLC	Lemon Cove, CA	61 GWh	Feb 1990	Dec 2023	Water
Cuyama Solar, LLC	Cuyama Solar, LLC	Cuyama, CA	61 GWh	Oct 2017	Mar 2025	Solar
Plant No 2 Orange County	Orange County Sanitation Dist	Huntington Beach, CA	59 GWh	May 1993	Dec 2023	Other Biomass Gas : 77.5% Natural Gas : 22.5%
Potrero Hills Energy Producers	Potrero Hills Energy Producers, LLC	Suisun City, CA	59 GWh	Mar 2016	Dec 2023	Landfill Gas
California Institute of Technology	California Institute-Technology	Pasadena, CA	59 GWh	Jul 2003	Mar 2025	Natural Gas
McKittrick Cogen	Chevron USA Inc	McKittrick, CA	59 GWh	May 2012	Dec 2023	Natural Gas
Hayworth Solar	AES Distributed Energy	Edison, CA	58 GWh	Nov 2015	Dec 2023	Solar
Camanche	East Bay Municipal Util Dist	Clements & Wallace, CA	58 GWh	Jun 1983	Dec 2023	Water
Southeast Kern River Cogen	Chevron USA Inc	Bakersfield, CA	58 GWh	Jan 1989	Mar 2025	Natural Gas
Mammoth G1	Ormat Nevada Inc	Mammoth lakes, CA	58 GWh	Nov 1984	Dec 2023	Geothermal
Sunray 2	Sunray Energy 2, LLC	Daggett, CA	57 GWh	Nov 1984	Dec 2023	Solar
Kingbird A Solar LLC	Arevon Energy, Inc.	Rosamond, CA	56 GWh	Mar 2016	Dec 2023	Solar
Kingbird B Solar, LLC	Arevon Energy, Inc.	Rosamond, CA	56 GWh	Mar 2016	Dec 2023	Solar
Adelanto Solar, LLC	Adelanto Solar, LLC	Adelanto, CA	55 GWh	Aug 2015	Dec 2023	Solar
Cymric 36W Cogen	Chevron USA Inc	McKittrick, CA	54 GWh	Sep 1982	Dec 2023	Natural Gas
Mojave 16/17/18	Terra-Gen Operating Co-Wind	Mojave, CA	54 GWh	Nov 1989	Dec 2023	Wind
Axium Modesto Solar	Axium US Solar Holdings LLC	Modesto, CA	54 GWh	Nov 2012	Dec 2023	Solar
TA-Acacia, LLC	Onward Energy	Lancaster, CA	53 GWh	Oct 2014	Dec 2023	Solar
Cascade Solar	Cascade Solar LLC	Joshua Tree, CA	53 GWh	Dec 2013	Dec 2023	Solar
Elk Hills Cogen	California Resources Elk Hills LLC	Tupman, CA	53 GWh	Oct 1994	Mar 2025	Natural Gas
Riverside Energy Resource Center	City of Riverside - (CA)	Riverside, CA	53 GWh	May 2006	Dec 2023	Natural Gas
Taft 26C Cogen	Chevron USA Inc	Taft, CA	52 GWh	Jun 1982	Mar 2025	Natural Gas
Edwards Sanborn E3	Terra-Gen Operating Co-Hybrid	Mojave, CA	52 GWh	Nov 2021	Mar 2025	Solar
Solar Oasis LLC	Solar Oasis, LLC	Palmdale, CA	51 GWh	Dec 2015	Dec 2023	Solar
SEPV Mojave West	AES Distributed Energy	Mojave, CA	51 GWh	May 2016	Dec 2023	Solar
RE Kansas South LLC	RE Kansas South LLC	Lemoore, CA	51 GWh	May 2013	Dec 2023	Solar
Lone Valley Solar Park II LLC	Lone Valley Solar Park II LLC	Lucerne Valley, CA	50 GWh	Nov 2014	Dec 2023	Solar
Bishop Creek 4	Southern California Edison Co	Bishop, CA	50 GWh	Aug 1905	Dec 2023	Water
Whitney Point Solar	Whitney Point Solar, LLC	Five Points, CA	50 GWh	Feb 2017	Dec 2023	Solar
Western Antelope Blue Sky B	AES Distributed Energy	Lancaster, CA	49 GWh	Nov 2016	Dec 2023	Solar
Yuba City Energy Center	Calpine Corp-Yuba City	Yuba City, CA	49 GWh	Jul 2002	Dec 2023	Natural Gas
White River Solar 2	Consolidated Edison Development Inc.	Alpaugh, CA	49 GWh	Aug 2014	Dec 2023	Solar
Corcoran Solar 3	Consolidated Edison Development Inc.	Corcoran, CA	49 GWh	Jan 2016	Dec 2023	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#26	Arizona Public Service Company	23.0 TWh	75
#55	Arlington Valley, LLC	3.4 TWh	1
#35	Balancing Authority of Northern California	15.1 TWh	83
#48	Imperial Irrigation District	5.9 TWh	65
#33	Los Angeles Department of Water and Power	17.7 TWh	120
#22	Nevada Power Company	38.2 TWh	136
#54	New Harquahala Generating Company, LLC	3.5 TWh	1
#18	Salt River Project Agricultural Improvement and Power District	58.7 TWh	45
#58	Turlock Irrigation District	2.1 TWh	11
#44	Western Area Power Administration - Desert Southwest Region	8.1 TWh	30

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	476.4 TWh	1,139
#5	Southwest Power Pool	297.0 TWh	762
#6	Southern Company Services, Inc. - Trans	252.0 TWh	393
#7	California Independent System Operator	190.4 TWh	1,943
#8	Tennessee Valley Authority	158.8 TWh	170
#10	Florida Power & Light Co.	148.6 TWh	159
#12	New York Independent System Operator	130.6 TWh	1,100
#13	Duke Energy Carolinas	111.4 TWh	556
#15	ISO New England	103.1 TWh	1,487
#16	Bonneville Power Administration	82.1 TWh	158