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	Mar 2026
Annual Generation	179.9 TWh
Power Plants	2,075
Utilities	965
Ranked #7 out of 65 in terms of net annual generation
Ranked #8 out of 54 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 40.1% Solar \| 27.8% Water \| 12.2% Wind \| 10.2% Nuclear \| 9.7%

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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
Richmond Cogen	Chevron Products Company-Richmond	Richmond, CA	970 GWh	Jul 1992	Dec 2025	Natural Gas : 97.5% Other Gas : 2.5%
J S Eastwood	Southern California Edison Co	Shaver Lake, CA	87 GWh	Nov 1987	Dec 2025	Water
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	315 GWh	Oct 1989	Dec 2025	Geothermal
Loma Linda University Cogen	Loma Linda University	Loma Linda, CA	64 GWh	Jan 1980	Dec 2025	Natural Gas
Delta Energy Center	Delta Energy Center LLC	Pittsburg, CA	4 TWh	Apr 2002	Dec 2025	Natural Gas
Dixie Valley	Ormat Nevada Inc	Fallon, NV	423 GWh	May 1988	Dec 2025	Geothermal
Gas Utilization Facility	City of San Diego	San Diego, CA	30 GWh	May 1985	Dec 2025	Other Biomass Gas
Belden	Pacific Gas & Electric Co.	Belden, CA	243 GWh	Aug 1969	Dec 2025	Water
Metcalf Energy Center	Calpine Corp - Metcalf Energy Center	San Jose, CA	2 TWh	May 2005	Dec 2025	Natural Gas
US Borax	U S Borax Inc	Boron, CA	274 GWh	Jun 1984	Dec 2025	Natural Gas
Encina Water Pollution Control	Encina Joint Powers Authority	Carlsbad, CA	14 GWh	Oct 2008	Dec 2025	Other Biomass Gas : 93.6% Natural Gas : 6.4%
Caribou 2	Pacific Gas & Electric Co.	Belden, CA	442 GWh	Oct 1958	Dec 2025	Water
Martinez Refining	Martinez Refining Co	Martinez, CA	734 GWh	Oct 1995	Dec 2025	Natural Gas : 96.7% Other Gas : 3.3%
Salinas River Cogeneration	Salinas River Cogeneration Co	San Ardo, CA	262 GWh	Oct 1991	Dec 2025	Natural Gas
Badger Creek Limited	WCAC Operating Company	Bakersfield, CA	5 GWh	Mar 1991	Dec 2025	Natural Gas
New-Indy Ontario Mill	New-Indy Ontario LLC	Ontario, CA	245 GWh	May 1985	Dec 2025	Natural Gas
Argus Cogen Plant	Searles Valley Minerals Operations Inc.	Trona, CA	247 GWh	Nov 1947	Dec 2025	Bituminous Coal : 95.0% Natural Gas : 5.0%
Solano Wind	Sacramento Municipal Util Dist	Rio Vista, CA	770 GWh	May 1994	Dec 2025	Wind
San Diego State University	San Diego State University	San Diego, CA	53 GWh	Aug 2002	Dec 2025	Natural Gas : 97.3% Solar : 2.7%
Coso Finance Partners	Coso Operating Co LLC	Inyokern, CA	365 GWh	Jun 1987	Dec 2025	Geothermal
Electra	Pacific Gas & Electric Co.	Jackson, CA	291 GWh	May 1948	Dec 2025	Water
Valero Refinery Cogeneration Unit 1	Valero Refining Co California	Benicia, CA	276 GWh	Sep 2002	Dec 2025	Natural Gas : 85.0% Other Gas : 15.0%
High Desert Power Plant	MRP Generation Holdings, LLC	Victorville, CA	3 TWh	Mar 2003	Dec 2025	Natural Gas
CP Kelco San Diego Plant	CP Kelco US Inc.	San Diego, CA	75 GWh	Sep 1983	Dec 2025	Natural Gas
Taft 26C Cogen	Chevron USA Inc	Taft, CA	43 GWh	Jun 1982	Dec 2025	Natural Gas
Humboldt Bay	Pacific Gas & Electric Co.	Eureka, CA	348 GWh	Aug 2010	Dec 2025	Natural Gas : 99.6%
James B Black	Pacific Gas & Electric Co.	Big Bend, CA	624 GWh	Nov 1965	Dec 2025	Water
Saint Agnes Medical Center	Saint Agnes Medical Center	Fresno, CA	35 GWh	Apr 2001	Dec 2025	Natural Gas
Kerckhoff 2	Pacific Gas & Electric Co.	Auberry, CA	419 GWh	Apr 1983	Dec 2025	Water
Dynegy Moss Landing Power Plant Hybrid	Dynegy -Moss Landing LLC	Moss Landing, CA	2 TWh	Nov 1967	Dec 2025	Natural Gas
Big Creek Water Works	Big Creek Water Works Ltd	Hyampom, CA	10 GWh	Dec 1986	Dec 2025	Water
El Segundo Cogen	Chevron USA Inc-El Segundo	El Segundo, CA	1 TWh	Nov 1987	Dec 2025	Natural Gas : 99.7%
South Belridge Cogeneration Facility	AERA Energy LLC	McKittrick, CA	469 GWh	Nov 1985	Dec 2025	Natural Gas
Geothermal 2	Northern California Power Agny	Middletown, CA	322 GWh	Nov 1985	Dec 2025	Geothermal
San Jose Cogeneration	San Jose State University Fclts Dev &Ops	San Jose, CA	35 GWh	Nov 1984	Dec 2025	Natural Gas
Pit 4	Pacific Gas & Electric Co.	Big Bend, CA	397 GWh	Jun 1955	Dec 2025	Water
Pit 5	Pacific Gas & Electric Co.	Big Bend, CA	541 GWh	Mar 1944	Dec 2025	Water
Lockhart Solar PV, LLC	Terra-Gen Operating Co-Solar	Hinkley, CA	243 GWh	Nov 1989	Dec 2025	Solar
Pit 7	Pacific Gas & Electric Co.	Montgomery Creek, CA	439 GWh	Aug 1965	Dec 2025	Water
Poe	Pacific Gas & Electric Co.	Storrie, CA	361 GWh	Sep 1958	Dec 2025	Water
Rock Creek	Pacific Gas & Electric Co.	Storrie, CA	598 GWh	Feb 1950	Dec 2025	Water
Blythe Energy Inc	AltaGas Blythe Operations Inc	Blythe, CA	315 GWh	Nov 2003	Dec 2025	Natural Gas
Berry Cogen Tanne Hills 18	Berry Petroleum Co	Maricopa, CA	140 GWh	Nov 1986	Dec 2025	Natural Gas
Pacific-Ultrapower Chinese Station	IHI Power Services Corp	Jamestown, CA	126 GWh	Sep 1986	Dec 2025	Wood/Wood Waste Solids : 99.6%
Oxnard Wastewater Treatment Plant	Oxnard City of	Oxnard, CA	4 GWh	Jul 1981	Dec 2025	Other Biomass Gas : 95.3% Natural Gas : 4.7%
Municipal Cogen Plant	Palm Springs City of	Palm Springs, CA	6 GWh	Apr 1985	Dec 2025	Natural Gas
Diablo Canyon	Pacific Gas & Electric Co.	Avila Beach, CA	18 TWh	Apr 1985	Dec 2025	Nuclear
Geysers Unit 5-20	Geysers Power Co LLC	Middletown, CA	4 TWh	Mar 1971	Dec 2025	Geothermal
Naval Hospital Medical Center	Department of the Navy	San Diego, CA	23 GWh	Nov 2003	Dec 2025	Natural Gas
Marathon Bay Area Cogen	Tesoro Marketing & Refining Co. LLC (Martinez)	Martinez, CA	585 GWh	Jan 1987	Dec 2025	Natural Gas
Southeast Kern River Cogen	Chevron USA Inc	Bakersfield, CA	44 GWh	Jan 1989	Dec 2025	Natural Gas
Kern River Eastridge Cogen	Chevron USA Inc	Bakersfield, CA	225 GWh	May 1988	Dec 2025	Natural Gas
Elk Hills Power LLC	Elk Hills Power LLC	Tupman, CA	3 TWh	Jun 2003	Dec 2025	Natural Gas
Midway Sunset Cogen	Midway-Sunset Cogeneration Co	Fellows, CA	47 GWh	Apr 1989	Dec 2025	Natural Gas
Collierville Powerhouse	Northern California Power Agny	Murphys, CA	342 GWh	Oct 1989	Dec 2025	Water
Big Creek 3	Southern California Edison Co	Auberry, CA	674 GWh	Aug 1923	Dec 2025	Water
Big Creek 4	Southern California Edison Co	North Fork, CA	365 GWh	May 1951	Dec 2025	Water
Biola University Hybrid	Biola University	La Mirada, CA	13 GWh	Mar 1990	Dec 2025	Natural Gas
Big Creek 2A	Southern California Edison Co	Auberry, CA	259 GWh	Jul 1928	Dec 2025	Water
Crockett Cogen Project	Crockett Cogeneration	Crockett, CA	1 TWh	Nov 1995	Dec 2025	Natural Gas
Desert Star Energy Center	Desert Star Energy Center SDG&E	Boulder City, NV	375 GWh	Apr 2000	Dec 2025	Natural Gas
Live Oak Limited	WCAC Operating Company	Bakersfield, CA	21 GWh	Feb 1992	Dec 2025	Natural Gas
PE Berkeley	Berkeley Cogeneration Facility	Berkeley, CA	167 GWh	May 1987	Dec 2025	Natural Gas
Sunrise Power LLC	Sunrise Power Co LLC	Fellows, CA	2 TWh	May 2001	Dec 2025	Natural Gas
Geothermal 1	Northern California Power Agny	Middletown, CA	338 GWh	Dec 1982	Dec 2025	Geothermal
Otay Mesa Generating Project	Otay Mesa Energy Center LLC	San Diego, CA	2 TWh	Sep 2009	Dec 2025	Natural Gas
Childrens Hospital	DTE San Diego COGEN Inc.	San Diego, CA	25 GWh	Mar 2000	Dec 2025	Natural Gas : 99.9%
King City Power Plant	Calpine King City Cogen LLC	King City, CA	24 GWh	Jan 1989	Dec 2025	Natural Gas
California Institute of Technology	California Institute-Technology	Pasadena, CA	42 GWh	Jul 2003	Dec 2025	Natural Gas
Kaweah Delta District Hospital	Kaweah Delta Hospital	Visalia, CA	22 GWh	Sep 2008	Dec 2025	Natural Gas
Greenleaf 2 Power Plant	Greenleaf Energy LLC	Yuba City, CA	37 GWh	Sep 1989	Dec 2025	Natural Gas
Mammoth Pool	Southern California Edison Co	North Fork, CA	466 GWh	Feb 1960	Dec 2025	Water
La Paloma Generating Plant	CXA La Paloma LLC	McKittrick, CA	2 TWh	Dec 2002	Dec 2025	Natural Gas
Kern River Cogeneration	Kern River Cogeneration Co	Bakersfield, CA	112 GWh	Jun 1985	Dec 2025	Natural Gas
Bear Mountain Limited	WCAC Operating Company	Bakersfield, CA	36 GWh	Mar 1995	Dec 2025	Natural Gas
Thermalito	California Dept. of Water Resources	Oroville, CA	322 GWh	Jan 1968	Dec 2025	Water
Puente Hills Energy Recovery	Los Angeles County Sanitation	Whittier, CA	150 GWh	Sep 1986	Dec 2025	Landfill Gas
Mountainview Generating Station	Southern California Edison Co	Redlands, CA	1 TWh	Nov 2005	Dec 2025	Natural Gas
Humboldt Sawmill Company	Mendocino Forest Products	Scotia, CA	107 GWh	Dec 1937	Dec 2025	Wood/Wood Waste Solids : 99.8%
Dion R Holm	City & County of San Francisco	Groveland, CA	578 GWh	Jul 1960	Dec 2025	Water
Moccasin	City & County of San Francisco	Moccasin, CA	277 GWh	Jul 1969	Dec 2025	Water
R C Kirkwood	City & County of San Francisco	Groveland, CA	400 GWh	Jan 1967	Dec 2025	Water
Mountain View I & II	AES Distributed Energy	North Palm Springs, CA	275 GWh	May 2001	Dec 2025	Wind
Calistoga Power Plant	Geysers Power Co LLC	Middletown, CA	455 GWh	Feb 1984	Dec 2025	Geothermal
Pastoria Energy Facility, LLC	Calpine Corp - Pastoria Energy Center	Lebec, CA	4 TWh	Apr 2005	Dec 2025	Natural Gas
E F Oxnard Energy Facility	EF Oxnard, LLC	Oxnard, CA	5 GWh	May 1990	Dec 2025	Natural Gas
Painted Hills Wind Park	Terra-Gen Operating Co-Wind	Whitewater, CA	168 GWh	Oct 1985	Dec 2025	Wind
Oxnard	Procter&Gamble Paper Products Co-Oxnard	Oxnard, CA	482 GWh	Jun 1982	Dec 2025	Natural Gas
Watson Cogeneration	ARCO Products Co-Watson	Carson, CA	2 TWh	Nov 1987	Dec 2025	Natural Gas : 76.4% Other Gas : 22.7% Waste/Other Oil : 0.9%
SRI International Cogen Project	IPT SRI Cogeneration Inc	Menlo Park, CA	24 GWh	Mar 1987	Dec 2025	Natural Gas
Torrance Refining Company, LLC	Torrance Refining Company, LLC	Torrance, CA	81 GWh	Aug 1983	Dec 2025	Other Gas : 66.8% Waste Heat : 33.2%
Los Esteros Critical Energy Center	Los Esteros Critical Energy Facility LLC	San Jose, CA	157 GWh	Jan 2003	Dec 2025	Natural Gas
Mesa Wind Power LLC	Brookfield Renewable Trading and Marketing LP	North Palm Springs, CA	123 GWh	Oct 1984	Dec 2025	Wind
Los Medanos Energy Center	Los Medanos Energy Center LLC	Pittsburg, CA	2 TWh	Jul 2001	Dec 2025	Natural Gas
Middle Fork	Placer County Water Agency	Foresthill, CA	424 GWh	Sep 1966	Dec 2025	Water
Pebbly Beach Generating Station Hybrid	Southern California Edison Co	Avalon, CA	28 GWh	Jun 1958	Dec 2025	Distillate Fuel Oil : 94.9% Gaseous Propane : 5.1%
Wheelabrator Shasta	Shasta Sustainable Resource Management, Inc.	Anderson, CA	285 GWh	Sep 1987	Dec 2025	Wood/Wood Waste Solids
Berry Placerita Cogen	Shadow Wolf Energy	Santa Clarita, CA	4 GWh	Feb 1990	Dec 2025	Natural Gas
Devil Canyon	California Dept. of Water Resources	San Bernardino, CA	790 GWh	Nov 1972	Dec 2025	Water
Edward C Hyatt	California Dept. of Water Resources	Oroville, CA	2 TWh	Feb 1968	Dec 2025	Water

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#26	Arizona Public Service Company	24.1 TWh	92
#55	Arlington Valley, LLC	3.0 TWh	1
#37	Balancing Authority of Northern California	14.4 TWh	87
#48	Imperial Irrigation District	6.4 TWh	66
#31	Los Angeles Department of Water and Power	18.3 TWh	124
#22	Nevada Power Company	37.3 TWh	139
#64	New Harquahala Generating Company, LLC	107.5 GWh	1
#19	Salt River Project Agricultural Improvement and Power District	60.3 TWh	48
#57	Turlock Irrigation District	2.0 TWh	11
#39	Western Area Power Administration - Desert Southwest Region	10.0 TWh	33

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	484.9 TWh	1,313
#5	Southwest Power Pool	300.1 TWh	835
#6	Southern Company Services, Inc. - Trans	250.9 TWh	417
#7	California Independent System Operator	179.9 TWh	2,075
#9	Tennessee Valley Authority	162.4 TWh	204
#10	Florida Power & Light Co.	150.5 TWh	187
#12	New York Independent System Operator	134.0 TWh	1,211
#13	Duke Energy Carolinas	112.4 TWh	565
#15	ISO New England	110.5 TWh	1,577
#16	Bonneville Power Administration	85.9 TWh	163