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
Malburg	City of Vernon	Vernon, CA	362 GWh	Sep 2005	Mar 2025	Natural Gas
WWTP Power Generation Station	East Bay Municipal Util Dist	Oakland, CA	30 GWh	Jul 1985	Mar 2025	Other Biomass Gas : 98.8% Distillate Fuel Oil : 1.2%
Donald Von Raesfeld Power Plant	City of Santa Clara - (CA)	Santa Clara, CA	884 GWh	Feb 2005	Mar 2025	Natural Gas
Palomar Energy	San Diego Gas & Electric Co	Escondido, CA	956 GWh	Sep 2005	Mar 2025	Natural Gas
Elk Hills Cogen	California Resources Elk Hills LLC	Tupman, CA	53 GWh	Oct 1994	Mar 2025	Natural Gas
Sun Streams 2	Sun Streams 2, LLC	Hassayampa, AZ	311 GWh	May 2021	Mar 2025	Solar
Tracy Combined Cycle Power Plant	MRP San Joaquin Energy LLC.	Tracy, CA	964 GWh	Mar 2003	Mar 2025	Natural Gas
Point Wind	Terra-Gen Operating Co-Wind	Tehachapi, CA	237 GWh	Feb 2021	Mar 2025	Wind
Valero Refinery Cogeneration Unit 1	Valero Refining Co California	Benicia, CA	171 GWh	Sep 2002	Mar 2025	Natural Gas : 94.2% Other Gas : 5.8%
Los Esteros Critical Energy Center	Los Esteros Critical Energy Facility LLC	San Jose, CA	248 GWh	Jan 2003	Mar 2025	Natural Gas
Mountain View I & II	AES Distributed Energy	North Palm Springs, CA	285 GWh	May 2001	Mar 2025	Wind
Pastoria Energy Facility, LLC	Calpine Corp - Pastoria Energy Center	Lebec, CA	4 TWh	Apr 2005	Mar 2025	Natural Gas
Chevron - Lost Hills Hybrid	MN8 Energy LLC	Lost Hills, CA	68 GWh	Mar 2020	Mar 2025	Solar
High Desert Power Plant	MRP Generation Holdings, LLC	Victorville, CA	4 TWh	Mar 2003	Mar 2025	Natural Gas
Elk Hills Power LLC	Elk Hills Power LLC	Tupman, CA	3 TWh	Jun 2003	Mar 2025	Natural Gas
Metcalf Energy Center	Calpine Corp - Metcalf Energy Center	San Jose, CA	2 TWh	May 2005	Mar 2025	Natural Gas
Otay Mesa Generating Project	Otay Mesa Energy Center LLC	San Diego, CA	2 TWh	Sep 2009	Mar 2025	Natural Gas
Delta Energy Center	Delta Energy Center LLC	Pittsburg, CA	3 TWh	Apr 2002	Mar 2025	Natural Gas
Blythe Energy Inc	AltaGas Blythe Operations Inc	Blythe, CA	577 GWh	Nov 2003	Mar 2025	Natural Gas
La Paloma Generating Plant	CXA La Paloma LLC	McKittrick, CA	2 TWh	Dec 2002	Mar 2025	Natural Gas
Crockett Cogen Project	Crockett Cogeneration	Crockett, CA	1 TWh	Nov 1995	Mar 2025	Natural Gas
Desert Star Energy Center	Desert Star Energy Center SDG&E	Boulder City, NV	784 GWh	Apr 2000	Mar 2025	Natural Gas
Martinez Refining	Martinez Refining Co	Martinez, CA	788 GWh	Oct 1995	Mar 2025	Natural Gas : 96.0% Other Gas : 4.0%
Saint Agnes Medical Center	Saint Agnes Medical Center	Fresno, CA	26 GWh	Apr 2001	Mar 2025	Natural Gas
Live Oak Limited	WCAC Operating Company	Bakersfield, CA	12 GWh	Feb 1992	Mar 2025	Natural Gas
Goal Line LP	Goal Line LP	Escondido, CA	11 GWh	Jul 1994	Mar 2025	Natural Gas
Slate Hybrid	MN8 Energy LLC	Stratford, CA	703 GWh	Oct 2021	Mar 2025	Solar
Collierville Powerhouse	Northern California Power Agny	Murphys, CA	496 GWh	Oct 1989	Mar 2025	Water
Solar Blue	Westlands Solar Blue (OZ) Owner, LLC	Lemoore, CA	665 GWh	Nov 2023	Mar 2025	Solar : 95.8%
Chestnut	Chestnut Westside, LLC	Lemoore, CA	385 GWh	Nov 2023	Mar 2025	Solar : 95.4%
Golden Field Solar III, LLC	Golden Field Solar III, LLC	Rosamond, CA	535 GWh	Nov 2020	Mar 2025	Solar
Titan Solar 1 (CA)	Titan Solar 1, LLC	Borrego Springs, CA	152 GWh	Nov 2020	Mar 2025	Solar
Central 40	Central 40, LLC	Newman, CA	64 GWh	Jan 2021	Mar 2025	Solar
Western Power & Steam Inc	Western Power and Steam II LLC	Bakersfield, CA	20 GWh	Feb 1990	Mar 2025	Natural Gas
Biola University Hybrid	Biola University	La Mirada, CA	12 GWh	Mar 1990	Mar 2025	Natural Gas
Midway Sunset Cogen	Midway-Sunset Cogeneration Co	Fellows, CA	255 GWh	Apr 1989	Mar 2025	Natural Gas
Desert Harvest II LLC	Desert Harvest II LLC	Desert Center, CA	166 GWh	Nov 2020	Mar 2025	Solar
CP Kelco San Diego Plant	CP Kelco US Inc.	San Diego, CA	76 GWh	Sep 1983	Mar 2025	Natural Gas
Maverick Solar 4, LLC	Maverick Solar 4, LLC	Desert Center, CA	241 GWh	Nov 2020	Mar 2025	Solar
Richmond Cogen	Chevron Products Company-Richmond	Richmond, CA	962 GWh	Jul 1992	Mar 2025	Natural Gas : 97.1% Other Gas : 2.9%
Kern River Eastridge Cogen	Chevron USA Inc	Bakersfield, CA	215 GWh	May 1988	Mar 2025	Natural Gas
Maverick Solar 6, LLC	Maverick Solar 6, LLC	Desert Center, CA	239 GWh	Oct 2021	Mar 2025	Solar
Maverick Solar 7, LLC	Maverick Solar 7, LLC	Desert Center, CA	302 GWh	Nov 2021	Mar 2025	Solar
Berry Placerita Cogen	Shadow Wolf Energy	Santa Clarita, CA	30 GWh	Feb 1990	Mar 2025	Natural Gas
Taft 26C Cogen	Chevron USA Inc	Taft, CA	52 GWh	Jun 1982	Mar 2025	Natural Gas
Fifth Standard Solar PV, LLC (Hybrid)	RWE Renewables Americas, LLC	Huron, CA	319 GWh	Aug 2023	Mar 2025	Solar
SE Athos II, LLC	SE Athos II, LLC	Desert Center, CA	516 GWh	Nov 2021	Mar 2025	Solar
Dixie Valley	Ormat Nevada Inc	Fallon, NV	303 GWh	May 1988	Mar 2025	Geothermal
Coachella Hills Wind	Terra-Gen Operating Co-Wind	Palm Springs, CA	216 GWh	Feb 2021	Mar 2025	Wind
Naval Hospital Medical Center	Department of the Navy	San Diego, CA	11 GWh	Nov 2003	Mar 2025	Natural Gas
Wheelabrator Shasta	Shasta Sustainable Resource Management, Inc.	Anderson, CA	278 GWh	Sep 1987	Mar 2025	Wood/Wood Waste Solids
Salinas River Cogeneration	Salinas River Cogeneration Co	San Ardo, CA	256 GWh	Oct 1991	Mar 2025	Natural Gas
Summit Winds	Greenbacker Renewable Energy Corporation	Livermore, CA	175 GWh	Jun 2021	Mar 2025	Wind
PE Berkeley	Berkeley Cogeneration Facility	Berkeley, CA	156 GWh	May 1987	Mar 2025	Natural Gas
South Belridge Cogeneration Facility	AERA Energy LLC	McKittrick, CA	476 GWh	Nov 1985	Mar 2025	Natural Gas
Southeast Kern River Cogen	Chevron USA Inc	Bakersfield, CA	58 GWh	Jan 1989	Mar 2025	Natural Gas
Municipal Cogen Plant	Palm Springs City of	Palm Springs, CA	7 GWh	Apr 1985	Mar 2025	Natural Gas
Torrance Refining Company, LLC	Torrance Refining Company, LLC	Torrance, CA	75 GWh	Aug 1983	Mar 2025	Other Gas : 80.9% Waste Heat : 19.1%
Berry Cogen Tanne Hills 18	Berry Petroleum Co	Maricopa, CA	139 GWh	Nov 1986	Mar 2025	Natural Gas
McKittrick Limited	WCAC Operating Company	Bakersfield, CA	10 GWh	Sep 1991	Mar 2025	Natural Gas
Pacific-Ultrapower Chinese Station	IHI Power Services Corp	Jamestown, CA	147 GWh	Sep 1986	Mar 2025	Wood/Wood Waste Solids : 99.6%
Arlington Energy Center II	Arlington Energy Center II	Blythe, CA	635 GWh	Feb 2022	Mar 2025	Solar
SRI International Cogen Project	IPT SRI Cogeneration Inc	Menlo Park, CA	24 GWh	Mar 1987	Mar 2025	Natural Gas
Resurgence Solar	Resurgence Solar	Boron, CA	248 GWh	Jul 2023	Mar 2025	Solar
Painted Hills Wind Park	Terra-Gen Operating Co-Wind	Whitewater, CA	171 GWh	Oct 1985	Mar 2025	Wind
Arlington Energy Center III	Arlington Energy Center III	Blythe, CA	293 GWh	Jul 2022	Mar 2025	Solar
Gas Utilization Facility	City of San Diego	San Diego, CA	32 GWh	May 1985	Mar 2025	Other Biomass Gas
Oxnard	Procter&Gamble Paper Products Co-Oxnard	Oxnard, CA	484 GWh	Jun 1982	Mar 2025	Natural Gas
Hudson - High Desert Hybrid	MN8 Energy LLC	Victorville, CA	280 GWh	Nov 2021	Mar 2025	Solar
Rabbitbrush Solar, LLC	Leeward Asset Management, LLC	Rosamond, CA	255 GWh	Sep 2022	Mar 2025	Solar : 99.8%
Rexford Solar Farm	AES Clean Energy	Ducor, CA	76 GWh	-	Mar 2025	Solar
Oxnard Wastewater Treatment Plant	Oxnard City of	Oxnard, CA	5 GWh	Jul 1981	Mar 2025	Other Biomass Gas : 93.4% Natural Gas : 6.6%
Watson Cogeneration	ARCO Products Co-Watson	Carson, CA	2 TWh	Nov 1987	Mar 2025	Natural Gas : 85.1% Other Gas : 14.7%
Berry Cogen	Berry Petroleum Co	Taft, CA	14 GWh	Nov 1986	Mar 2025	Natural Gas
US Borax	U S Borax Inc	Boron, CA	271 GWh	Jun 1984	Mar 2025	Natural Gas
Daggett 2	Daggett Solar Power 2 LLC	Daggett, CA	538 GWh	Nov 2023	Mar 2025	Solar
Daggett 3	Daggett Solar Power 3 LLC	Daggett, CA	884 GWh	Jun 2023	Mar 2025	Solar
Calistoga Power Plant	Geysers Power Co LLC	Middletown, CA	468 GWh	Feb 1984	Mar 2025	Geothermal
San Diego State University	San Diego State University	San Diego, CA	49 GWh	Aug 2002	Mar 2025	Natural Gas : 97.9% Solar : 2.1%
Humboldt Sawmill Company	Mendocino Forest Products	Scotia, CA	111 GWh	Dec 1937	Mar 2025	Wood/Wood Waste Solids : 99.7%
Chaparral Springs	Leeward Asset Management, LLC	Rosamond, CA	443 GWh	-	Mar 2025	Solar
Chalk Cliff Limited	WCAC Operating Company	Bakersfield, CA	11 GWh	Feb 1990	Mar 2025	Natural Gas
Edwards Sanborn E3	Terra-Gen Operating Co-Hybrid	Mojave, CA	52 GWh	Nov 2021	Mar 2025	Solar
Edwards Sanborn E1A	Terra-Gen Operating Co-Hybrid	Mojave, CA	330 GWh	Jul 2022	Mar 2025	Solar
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	308 GWh	Oct 1989	Mar 2025	Geothermal
Coso Finance Partners	Coso Operating Co LLC	Inyokern, CA	375 GWh	Jun 1987	Mar 2025	Geothermal
Edwards Sanborn E2	Terra-Gen Operating Co-Hybrid	Mojave, CA	293 GWh	Nov 2021	Mar 2025	Solar
Scarlet Solar (CA)	EDP Renewables North America LLC	Fresno, CA	365 GWh	-	Mar 2025	Solar
Arica Solar	Arica Solar, LLC	Desert Center, CA	659 GWh	-	Mar 2025	Solar
R C Kirkwood	City & County of San Francisco	Groveland, CA	417 GWh	Jan 1967	Mar 2025	Water
Geysers Unit 5-20	Geysers Power Co LLC	Middletown, CA	4 TWh	Mar 1971	Mar 2025	Geothermal
Baldy Mesa Solar & Storage	AES Clean Energy	Adelanto, CA	76 GWh	-	Mar 2025	Solar : 99.8%
Solano Wind	Sacramento Municipal Util Dist	Rio Vista, CA	697 GWh	May 1994	Mar 2025	Wind
Resurgence Solar II	Resurgence Solar II	Boron, CA	134 GWh	Jul 2023	Mar 2025	Solar
Rock Creek	Pacific Gas & Electric Co.	Storrie, CA	609 GWh	Feb 1950	Mar 2025	Water
Poe	Pacific Gas & Electric Co.	Storrie, CA	315 GWh	Sep 1958	Mar 2025	Water
Pit 7	Pacific Gas & Electric Co.	Montgomery Creek, CA	319 GWh	Aug 1965	Mar 2025	Water
Oberon Solar Project	IP Oberon LLC	Desert Center, CA	545 GWh	Aug 2023	Mar 2025	Solar
Oberon II Solar Project	IP Oberon II, LLC	Desert Center, CA	593 GWh	Aug 2023	Mar 2025	Solar
Edwards Sanborn S4	Terra-Gen Operating Co-Hybrid	Mojave, CA	77 GWh	Oct 2022	Mar 2025	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