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
Pine Flat	Kings River Conservation Dist	Piedra, CA	331 GWh	Dec 1983	Sep 2025	Water
Berry Cogen	Berry Petroleum Co	Taft, CA	8 GWh	Nov 1986	Sep 2025	Natural Gas
Hanford Energy Park Peaker	MRP San Joaquin Energy LLC.	Hanford, CA	6 GWh	Aug 2001	Sep 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
Henrietta Peaker	MRP San Joaquin Energy LLC.	Lemoore, CA	4 GWh	May 2002	Oct 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
Poe	Pacific Gas & Electric Co.	Storrie, CA	361 GWh	Sep 1958	Dec 2025	Water
E F Oxnard Energy Facility	EF Oxnard, LLC	Oxnard, CA	5 GWh	May 1990	Dec 2025	Natural Gas
Midway Sunset Cogen	Midway-Sunset Cogeneration Co	Fellows, CA	47 GWh	Apr 1989	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
El Segundo Energy Center LLC	NRG Energy Services LLC	El Segundo, CA	45 GWh	Jun 2013	Dec 2025	Natural Gas
Haas	Pacific Gas & Electric Co.	Balch Camp, CA	183 GWh	Nov 1958	Jan 2026	Water
Bear Mountain Limited	WCAC Operating Company	Bakersfield, CA	36 GWh	Mar 1995	Jan 2026	Natural Gas
Chalk Cliff Limited	WCAC Operating Company	Bakersfield, CA	3 GWh	Feb 1990	Jan 2026	Natural Gas
McKittrick Limited	WCAC Operating Company	Bakersfield, CA	5 GWh	Sep 1991	Jan 2026	Natural Gas
Naval Hospital Medical Center	Department of the Navy	San Diego, CA	23 GWh	Nov 2003	Jan 2026	Natural Gas
Goal Line LP	Goal Line LP	Escondido, CA	9 GWh	Jul 1994	Jan 2026	Natural Gas
High Desert Power Plant	MRP Generation Holdings, LLC	Victorville, CA	3 TWh	Mar 2003	Jan 2026	Natural Gas
Malaga Power LLC	CalPeak Power, LLC	Fresno, CA	8 GWh	Aug 2005	Jan 2026	Natural Gas
Ivanpah 1	NRG Energy Services	Nipton, CA	198 GWh	Nov 2013	Jan 2026	Solar : 96.2% Natural Gas : 3.8%
J S Eastwood	Southern California Edison Co	Shaver Lake, CA	96 GWh	Nov 1987	Feb 2026	Water
Belden	Pacific Gas & Electric Co.	Belden, CA	347 GWh	Aug 1969	Feb 2026	Water
Caribou 2	Pacific Gas & Electric Co.	Belden, CA	476 GWh	Oct 1958	Feb 2026	Water
Electra	Pacific Gas & Electric Co.	Jackson, CA	311 GWh	May 1948	Feb 2026	Water
Humboldt Bay	Pacific Gas & Electric Co.	Eureka, CA	343 GWh	Aug 2010	Feb 2026	Natural Gas : 99.6%
James B Black	Pacific Gas & Electric Co.	Big Bend, CA	604 GWh	Nov 1965	Feb 2026	Water
Dynegy Moss Landing Power Plant Hybrid	Dynegy -Moss Landing LLC	Moss Landing, CA	2 TWh	Nov 1967	Feb 2026	Natural Gas
Pit 4	Pacific Gas & Electric Co.	Big Bend, CA	412 GWh	Jun 1955	Feb 2026	Water
Pit 5	Pacific Gas & Electric Co.	Big Bend, CA	456 GWh	Mar 1944	Feb 2026	Water
Pit 7	Pacific Gas & Electric Co.	Montgomery Creek, CA	417 GWh	Aug 1965	Feb 2026	Water
Rock Creek	Pacific Gas & Electric Co.	Storrie, CA	577 GWh	Feb 1950	Feb 2026	Water
Geysers Unit 5-20	Geysers Power Co LLC	Middletown, CA	4 TWh	Mar 1971	Feb 2026	Geothermal
Big Creek 3	Southern California Edison Co	Auberry, CA	756 GWh	Aug 1923	Feb 2026	Water
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
Mammoth Pool	Southern California Edison Co	North Fork, CA	538 GWh	Feb 1960	Feb 2026	Water
Mountainview Generating Station	Southern California Edison Co	Redlands, CA	1 TWh	Nov 2005	Feb 2026	Natural Gas
Dion R Holm	City & County of San Francisco	Groveland, CA	594 GWh	Jul 1960	Feb 2026	Water
Moccasin	City & County of San Francisco	Moccasin, CA	290 GWh	Jul 1969	Feb 2026	Water
R C Kirkwood	City & County of San Francisco	Groveland, CA	462 GWh	Jan 1967	Feb 2026	Water
Middle Fork	Placer County Water Agency	Foresthill, CA	425 GWh	Sep 1966	Feb 2026	Water
Devil Canyon	California Dept. of Water Resources	San Bernardino, CA	834 GWh	Nov 1972	Feb 2026	Water
Edward C Hyatt	California Dept. of Water Resources	Oroville, CA	2 TWh	Feb 1968	Feb 2026	Water
Thermalito	California Dept. of Water Resources	Oroville, CA	330 GWh	Jan 1968	Feb 2026	Water
Kerckhoff 2	Pacific Gas & Electric Co.	Auberry, CA	471 GWh	Apr 1983	Feb 2026	Water
Diablo Canyon	Pacific Gas & Electric Co.	Avila Beach, CA	17 TWh	Apr 1985	Feb 2026	Nuclear
Dynegy Oakland Power Plant	Dynegy Oakland, LLC	Oakland, CA	1 GWh	Oct 1978	Feb 2026	Jet Fuel
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%
Geothermal 1	Northern California Power Agny	Middletown, CA	319 GWh	Dec 1982	Feb 2026	Geothermal
Geothermal 2	Northern California Power Agny	Middletown, CA	328 GWh	Nov 1985	Feb 2026	Geothermal
Solano Wind	Sacramento Municipal Util Dist	Rio Vista, CA	742 GWh	May 1994	Feb 2026	Wind
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%
Kaweah Delta District Hospital	Kaweah Delta Hospital	Visalia, CA	22 GWh	Sep 2008	Feb 2026	Natural Gas
Childrens Hospital	DTE San Diego COGEN Inc.	San Diego, CA	26 GWh	Mar 2000	Feb 2026	Natural Gas : 99.9%
Loma Linda University Cogen	Loma Linda University	Loma Linda, CA	62 GWh	Jan 1980	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%
California Institute of Technology	California Institute-Technology	Pasadena, CA	52 GWh	Jul 2003	Feb 2026	Natural Gas
Big Creek Water Works	Big Creek Water Works Ltd	Hyampom, CA	8 GWh	Dec 1986	Feb 2026	Water
King City Power Plant	Calpine King City Cogen LLC	King City, CA	22 GWh	Jan 1989	Feb 2026	Natural Gas
Marathon Bay Area Cogen	Tesoro Marketing & Refining Co. LLC (Martinez)	Martinez, CA	544 GWh	Jan 1987	Feb 2026	Natural Gas
Greenleaf 2 Power Plant	Greenleaf Energy LLC	Yuba City, CA	39 GWh	Sep 1989	Feb 2026	Natural Gas
New-Indy Ontario Mill	New-Indy Ontario LLC	Ontario, CA	245 GWh	May 1985	Feb 2026	Natural Gas
Lockhart Solar PV, LLC	Terra-Gen Operating Co-Solar	Hinkley, CA	241 GWh	Nov 1989	Feb 2026	Solar
Puente Hills Energy Recovery	Los Angeles County Sanitation	Whittier, CA	147 GWh	Sep 1986	Feb 2026	Landfill Gas
Kern River Cogeneration	Kern River Cogeneration Co	Bakersfield, CA	92 GWh	Jun 1985	Feb 2026	Natural Gas
San Jose Cogeneration	San Jose State University Fclts Dev &Ops	San Jose, CA	35 GWh	Nov 1984	Feb 2026	Natural Gas
Badger Creek Limited	WCAC Operating Company	Bakersfield, CA	4 GWh	Mar 1991	Feb 2026	Natural Gas
Argus Cogen Plant	Searles Valley Minerals Operations Inc.	Trona, CA	227 GWh	Nov 1947	Feb 2026	Bituminous Coal : 92.5% Natural Gas : 7.5%
Coso Finance Partners	Coso Operating Co LLC	Inyokern, CA	372 GWh	Jun 1987	Feb 2026	Geothermal
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	311 GWh	Oct 1989	Feb 2026	Geothermal
Humboldt Sawmill Company	Mendocino Forest Products	Scotia, CA	105 GWh	Dec 1937	Feb 2026	Wood/Wood Waste Solids : 99.8%
San Diego State University	San Diego State University	San Diego, CA	56 GWh	Aug 2002	Feb 2026	Natural Gas : 97.2% Solar : 2.8%
Calistoga Power Plant	Geysers Power Co LLC	Middletown, CA	456 GWh	Feb 1984	Feb 2026	Geothermal
US Borax	U S Borax Inc	Boron, CA	267 GWh	Jun 1984	Feb 2026	Natural Gas
Watson Cogeneration	ARCO Products Co-Watson	Carson, CA	2 TWh	Nov 1987	Feb 2026	Natural Gas : 77.2% Other Gas : 22.1% Waste/Other Oil : 0.7%
Oxnard Wastewater Treatment Plant	Oxnard City of	Oxnard, CA	3 GWh	Jul 1981	Feb 2026	Other Biomass Gas : 96.1% Natural Gas : 3.9%
AltaGas Ripon Energy Inc.	AltaGas Ripon Energy Inc.	Ripon, CA	396 MWh	Mar 1988	Feb 2026	Natural Gas
Oxnard	Procter&Gamble Paper Products Co-Oxnard	Oxnard, CA	482 GWh	Jun 1982	Feb 2026	Natural Gas
Gas Utilization Facility	City of San Diego	San Diego, CA	30 GWh	May 1985	Feb 2026	Other Biomass Gas
Painted Hills Wind Park	Terra-Gen Operating Co-Wind	Whitewater, CA	161 GWh	Oct 1985	Feb 2026	Wind
Mesa Wind Power LLC	Brookfield Renewable Trading and Marketing LP	North Palm Springs, CA	117 GWh	Oct 1984	Feb 2026	Wind
SRI International Cogen Project	IPT SRI Cogeneration Inc	Menlo Park, CA	24 GWh	Mar 1987	Feb 2026	Natural Gas
Pacific-Ultrapower Chinese Station	IHI Power Services Corp	Jamestown, CA	109 GWh	Sep 1986	Feb 2026	Wood/Wood Waste Solids : 99.5% Gaseous Propane : 0.5%
Berry Cogen Tanne Hills 18	Berry Petroleum Co	Maricopa, CA	139 GWh	Nov 1986	Feb 2026	Natural Gas
Torrance Refining Company, LLC	Torrance Refining Company, LLC	Torrance, CA	74 GWh	Aug 1983	Feb 2026	Other Gas : 66.2% Waste Heat : 33.8%
Municipal Cogen Plant	Palm Springs City of	Palm Springs, CA	7 GWh	Apr 1985	Feb 2026	Natural Gas
Southeast Kern River Cogen	Chevron USA Inc	Bakersfield, CA	28 GWh	Jan 1989	Feb 2026	Natural Gas
South Belridge Cogeneration Facility	AERA Energy LLC	McKittrick, CA	473 GWh	Nov 1985	Feb 2026	Natural Gas
PE Berkeley	Berkeley Cogeneration Facility	Berkeley, CA	151 GWh	May 1987	Feb 2026	Natural Gas
Salinas River Cogeneration	Salinas River Cogeneration Co	San Ardo, CA	253 GWh	Oct 1991	Feb 2026	Natural Gas
Wheelabrator Shasta	Shasta Sustainable Resource Management, Inc.	Anderson, CA	286 GWh	Sep 1987	Feb 2026	Wood/Wood Waste Solids
Dixie Valley	Ormat Nevada Inc	Fallon, NV	456 GWh	May 1988	Feb 2026	Geothermal
Taft 26C Cogen	Chevron USA Inc	Taft, CA	40 GWh	Jun 1982	Feb 2026	Natural Gas
Berry Placerita Cogen	Shadow Wolf Energy	Santa Clarita, CA	4 GWh	Feb 1990	Feb 2026	Natural Gas
Kern River Eastridge Cogen	Chevron USA Inc	Bakersfield, CA	219 GWh	May 1988	Feb 2026	Natural Gas
Richmond Cogen	Chevron Products Company-Richmond	Richmond, CA	979 GWh	Jul 1992	Feb 2026	Natural Gas : 97.6% Other Gas : 2.4%

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