California Independent System Operator

Balancing Authority Summary Information

California Independent System Operator is ranked #7 out of 64 balancing authorities in terms of total annual electricity generation.

Balancing Authority	California Independent System Operator
States	Arizona California Nevada New Mexico
Last Update	Oct 2026
Annual Generation	168.7 TWh
Power Plants	2,170
Utilities	1,001
Ranked #7 out of 64 in terms of net annual generation
Ranked #14 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 32% Solar \| 30.9% Water \| 12.2% Wind \| 11.8% Nuclear \| 11.2% Coal \| 0%

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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
Sonoma Central Landfill Phase II	County of Sonoma Dept of Trnsp	Petaluma, CA	2 GWh	May 1996	Dec 2025	Landfill Gas
Parnassus Central Utility Plant	University of California-San Francisco	San Francisco, CA	67 GWh	Dec 1995	Jul 2026	Natural Gas
Crockett Cogen Project	Crockett Cogeneration	Crockett, CA	1 TWh	Nov 1995	Feb 2026	Natural Gas
CCCSD Wastewater Treatment Plnt	Central Contra Costa Sanitary District	Martinez, CA	20 GWh	Nov 1995	Jul 2026	Natural Gas
Martinez Refining	Martinez Refining Co	Martinez, CA	662 GWh	Oct 1995	Jul 2026	Natural Gas : 96.3% Other Gas : 3.7%
Bear Mountain Limited	WCAC Operating Company	Bakersfield, CA	38 GWh	Mar 1995	Jul 2026	Natural Gas
Etiwanda	Metropolitan Water District of S CA	Rancho Cucamonga, CA	1 GWh	Nov 1994	Jul 2025	Water
Elk Hills Cogen	California Resources Elk Hills LLC	Tupman, CA	103 GWh	Oct 1994	Jul 2026	Natural Gas
Goal Line LP	Goal Line LP	Escondido, CA	13 GWh	Jul 1994	Jul 2026	Natural Gas
Solano Wind	Sacramento Municipal Util Dist	Rio Vista, CA	708 GWh	May 1994	Jul 2026	Wind
Ridgetop	Terra-Gen Operating Co-Wind	Mojave, CA	118 GWh	Mar 1994	Dec 2025	Wind
Springville Hydroelectric	Calleguas Mun Water District	Camarillo, CA	659 MWh	Feb 1994	Dec 2025	Water
Deadwood Creek	Hydro Sierra Energy, LLC	Dobbins, CA	2 GWh	Nov 1993	Dec 2025	Water
Grizzly	City of Santa Clara - (CA)	N/A, CA	43 GWh	Oct 1993	Dec 2025	Water
Sonoma Central Landfill Phase I	County of Sonoma Dept of Trnsp	Petaluma, CA	583 MWh	Jun 1993	Dec 2025	Landfill Gas
Plant No 1 Orange County	Orange County Sanitation Dist - (CA)	Fountain Valley, CA	41 GWh	May 1993	Dec 2025	Other Biomass Gas : 81.6% Natural Gas : 18.4%
Plant No 2 Orange County	Orange County Sanitation Dist - (CA)	Huntington Beach, CA	47 GWh	May 1993	Dec 2025	Other Biomass Gas : 77.2% Natural Gas : 22.8%
MM West Covina	MM West Covina Energy LLC	West Covina, CA	40 GWh	May 1993	Dec 2025	Landfill Gas : 99.7%
Richmond Cogen	Chevron Products Company-Richmond	Richmond, CA	957 GWh	Jul 1992	Jul 2026	Natural Gas : 97.6% Other Gas : 2.4%
Forks of Butte Hydro Project	Hypower Energy, LLC	Magalia, CA	58 GWh	Feb 1992	Dec 2025	Water
Live Oak Limited	WCAC Operating Company	Bakersfield, CA	18 GWh	Feb 1992	Jul 2026	Natural Gas
Salinas River Cogeneration	Salinas River Cogeneration Co	San Ardo, CA	256 GWh	Oct 1991	Jul 2026	Natural Gas
McKittrick Limited	WCAC Operating Company	Bakersfield, CA	5 GWh	Sep 1991	Jul 2026	Natural Gas
Badger Creek Limited	WCAC Operating Company	Bakersfield, CA	4 GWh	Mar 1991	Jul 2026	Natural Gas
Sky River Wind Energy Center	Sky River Wind LLC	Tehachapi, CA	211 GWh	Jan 1991	Dec 2025	Wind
City of Tulare Water Facility	City of Tulare Water Pollution Control - (CA)	Tulare, CA	16 GWh	Dec 1990	Dec 2025	Natural Gas : 61.0% Other Biomass Gas : 20.1% Solar : 19.0%
Isabella Hydro Project	Isabella Partners	Lake Isabella, CA	32 GWh	Nov 1990	Dec 2025	Water
Kingsburg Cogen	KES Kingsburg LP	Kingsburg, CA	8 GWh	Nov 1990	Sep 2025	Natural Gas
Mammoth G3	Ormat Nevada Inc	Mammoth Lakes, CA	75 GWh	Nov 1990	Dec 2025	Geothermal
Mammoth G2	Ormat Nevada Inc	Mammoth Lakes, CA	84 GWh	Nov 1990	Dec 2025	Geothermal
Mojave 3/4/5	Terra-Gen Operating Co-Wind	Mojave, CA	125 GWh	Nov 1990	Dec 2025	Wind
Yuba City Cogen Partners	Wellhead Services, Inc	Yuba City, CA	15 GWh	Nov 1990	Dec 2025	Natural Gas
Agnews Power Plant	OLS Energy-Agnews Inc.	San Jose, CA	9 GWh	Oct 1990	Dec 2025	Natural Gas
MM Yolo Power	Yolo County Community Services Department	Woodland, CA	16 GWh	Sep 1990	Dec 2025	Landfill Gas
E F Oxnard Energy Facility	EF Oxnard, LLC	Oxnard, CA	8 GWh	May 1990	Jul 2026	Natural Gas
Biola University Hybrid	Biola University	La Mirada, CA	13 GWh	Mar 1990	Jul 2026	Natural Gas
Burney Creek	Snow Mountain Hydro LLC	Burney, CA	9 GWh	Feb 1990	Dec 2025	Water
Ponderosa Bailey Creek	Snow Mountain Hydro LLC	Manton, CA	4 GWh	Feb 1990	Dec 2025	Water
Chalk Cliff Limited	WCAC Operating Company	Bakersfield, CA	3 GWh	Feb 1990	Jun 2026	Natural Gas
Berry Placerita Cogen	Shadow Wolf Energy	Santa Clarita, CA	4 GWh	Feb 1990	Jul 2026	Natural Gas
Terminus Hydroelectric Project	Eagle Creek Renewable Energy, LLC	Lemon Cove, CA	33 GWh	Feb 1990	Dec 2025	Water
Western Power & Steam Inc	Western Power and Steam II LLC	Bakersfield, CA	21 GWh	Feb 1990	Jul 2026	Natural Gas
Welport Lease Project	Sentinel Peak Resources California, LLC	McKittrick, CA	34 GWh	Feb 1990	Dec 2025	Natural Gas
Cove Hydroelectric	Snow Mountain Hydro LLC	Burney, CA	17 GWh	Jan 1990	Dec 2025	Water
Fresno Cogen Partners	Wellhead Services, Inc	San Joaquin, CA	840 MWh	Dec 1989	Dec 2025	Natural Gas
Bear Creek (CA)	Central Rivers Power US, LLC	Shingletown, CA	7 GWh	Dec 1989	Dec 2025	Water
Olsen	Olsen Power Partners	Whitmore, CA	15 GWh	Dec 1989	Dec 2025	Water
EDF Renewable Windfarm V Inc	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	23 GWh	Dec 1989	Dec 2025	Wind
Oroville Cogeneration, LLC	Apex Power Generation Corp.	Oroville, CA	116 MWh	Dec 1989	Dec 2025	Natural Gas
Carson Cogeneration	Carson Cogeneration Co	Carson, CA	3 GWh	Nov 1989	Sep 2025	Natural Gas
Tulare Success Power Project	Lower Tule River Irrgtn Dist	Porterville, CA	1 GWh	Nov 1989	Aug 2025	Water
Lockhart Solar PV, LLC	Terra-Gen Operating Co-Solar	Hinkley, CA	236 GWh	Nov 1989	Jul 2026	Solar
Lost Creek I	Snow Mountain Hydro LLC	Burney, CA	6 GWh	Nov 1989	Dec 2025	Water
Mojave 16/17/18	Terra-Gen Operating Co-Wind	Mojave, CA	66 GWh	Nov 1989	Dec 2025	Wind
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	316 GWh	Oct 1989	Jul 2026	Geothermal
Spicer Meadow Project	Northern California Power Agny	Murphys, CA	14 GWh	Oct 1989	Dec 2025	Water
Collierville Powerhouse	Northern California Power Agny	Murphys, CA	407 GWh	Oct 1989	Jul 2026	Water
Greenleaf 2 Power Plant	Greenleaf Energy LLC	Yuba City, CA	64 GWh	Sep 1989	Jun 2026	Natural Gas
Burney Forest Products	Burney Forest Products, A Joint Venture	Burney, CA	103 GWh	Sep 1989	Dec 2025	Wood/Wood Waste Solids : 69.9% Natural Gas : 30.1%
Nelson Creek	Nelson Creek Power Inc	Big Bend, CA	3 GWh	Sep 1989	Dec 2025	Water
Woodland Biomass Power Ltd	DTE Energy Services-Woodland	Woodland, CA	162 GWh	Aug 1989	Dec 2025	Wood/Wood Waste Solids : 99.5%
HL Power	HL Power Company	Wendel, CA	196 GWh	Jun 1989	Dec 2025	Wood/Wood Waste Solids : 99.4% Natural Gas : 0.6%
Aera San Ardo Cogen Facility	Aera Energy LLC-San Ardo	San Ardo, CA	20 GWh	Jun 1989	Dec 2025	Natural Gas
Rio Bravo Rocklin	Rio Bravo Rocklin	Lincoln, CA	147 GWh	May 1989	Dec 2025	Wood/Wood Waste Solids : 99.0% Natural Gas : 1.0%
Solano County Cogen Plant	Solano County - (CA)	Fairfield, CA	8 GWh	May 1989	Dec 2025	Natural Gas
Rio Bravo Hydro Project	Olcese Water District	Bakersfield, CA	27 GWh	Apr 1989	Nov 2025	Water
Aidlin Geothermal Power Plant	Geysers Power Co LLC	Middletown, CA	82 GWh	Apr 1989	Dec 2025	Geothermal
Midway Sunset Cogen	Midway-Sunset Cogeneration Co	Fellows, CA	8 GWh	Apr 1989	Jul 2026	Natural Gas
New Hogan Power Plant	Modesto Irrigation District	Valley Springs, CA	6 GWh	Mar 1989	Dec 2025	Water
Wadham Energy	Wadham Energy LP	Williams, CA	145 GWh	Feb 1989	Dec 2025	Agricultural By-Products : 99.7%
Double C Generation Limited Partnership	WCAC Operating Company	Bakersfield, CA	6 GWh	Feb 1989	Dec 2025	Natural Gas
High Sierra Limited	WCAC Operating Company	Bakersfield, CA	6 GWh	Feb 1989	Dec 2025	Natural Gas
King City Power Plant	Calpine King City Cogen LLC	King City, CA	28 GWh	Jan 1989	Jul 2026	Natural Gas
Greenleaf 1	Calpine Greenleaf Holding, Inc.	Yuba City, CA	3 GWh	Jan 1989	Dec 2025	Natural Gas
Kern Front Limited	WCAC Operating Company	Bakersfield, CA	5 GWh	Jan 1989	Dec 2025	Natural Gas
Southeast Kern River Cogen	Chevron USA Inc	Bakersfield, CA	43 GWh	Jan 1989	Jul 2026	Natural Gas
Haypress	EIF Haypress LLC	Sierra City, CA	17 GWh	Nov 1988	Jun 2025	Water
Muck Valley Hydroelectric	Malacha Hydro Limited Partnership	NA, CA	90 GWh	Nov 1988	Dec 2025	Water
Coso Energy Developers	Coso Operating Co LLC	Inyokern, CA	235 GWh	Nov 1988	Dec 2025	Geothermal
Harbor Cogen	Harbor Cogeneration Co.	Wilmington, CA	9 GWh	Nov 1988	Nov 2025	Natural Gas
Cymric 31X Cogen	Chevron USA Inc	McKittrick, CA	17 GWh	Sep 1988	Dec 2025	Natural Gas
Black Butte	City of Santa Clara - (CA)	Orland, CA	9 GWh	Aug 1988	Dec 2025	Water
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%
Dome Project	Sentinel Peak Resources California, LLC	Fellows, CA	48 GWh	Jul 1988	Dec 2025	Natural Gas
Monterey One Water	Monterey One Water	Marina, CA	8 GWh	Jul 1988	Dec 2025	Other Biomass Gas : 78.5% Natural Gas : 21.5%
Coalinga Cogeneration Facility	Aera Energy LLC-Coalinga	Coalinga, CA	42 GWh	May 1988	Dec 2025	Natural Gas
Dixie Valley	Ormat Nevada Inc	Fallon, NV	469 GWh	May 1988	Jul 2026	Geothermal
Kern River Eastridge Cogen	Chevron USA Inc	Bakersfield, CA	211 GWh	May 1988	Jul 2026	Natural Gas
AltaGas Ripon Energy Inc.	AltaGas Ripon Energy Inc.	Ripon, CA	2 GWh	Mar 1988	Jul 2026	Natural Gas
J S Eastwood	Southern California Edison Co	Shaver Lake, CA	100 GWh	Nov 1987	Jul 2026	Water
El Segundo Cogen	Chevron USA Inc-El Segundo	El Segundo, CA	1 TWh	Nov 1987	Jul 2026	Natural Gas : 99.8%
Sycamore Cogeneration	Sycamore Cogeneration Co	Bakersfield, CA	144 GWh	Nov 1987	Jun 2026	Natural Gas
Watson Cogeneration	ARCO Products Co-Watson	Carson, CA	2 TWh	Nov 1987	Jul 2026	Natural Gas : 77.0% Other Gas : 22.7%
CamChino Leasing LLC	CamChino Leasing LLC	Chino, CA	2 GWh	Nov 1987	Dec 2025	Natural Gas
San Gabriel Hydro Project	Los Angeles County-San Gabriel	Azusa, CA	2 GWh	Nov 1987	Apr 2025	Water
Stockton Biomass	DTE Stockton LLC	Stockton, CA	355 GWh	Nov 1987	Dec 2025	Wood/Wood Waste Solids : 99.6%
Gilroy Power Plant	Calpine Gilroy Cogen LP	Gilroy, CA	21 GWh	Sep 1987	Dec 2025	Natural Gas
Wheelabrator Shasta	Shasta Sustainable Resource Management, Inc.	Anderson, CA	290 GWh	Sep 1987	Jul 2026	Wood/Wood Waste Solids
Univ of San Francisco Cogen	University of San Francisco	San Francisco, CA	5 GWh	Aug 1987	Dec 2024	Natural Gas
Moccasin Low Head Hydro Project	City & County of San Francisco - (CA)	Moccasin, CA	3 GWh	Jun 1987	Dec 2025	Water

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#25	Arizona Public Service Company	25.8 TWh	102
#55	Arlington Valley, LLC	3.2 TWh	1
#38	Balancing Authority of Northern California	13.9 TWh	91
#49	Imperial Irrigation District	6.2 TWh	66
#29	Los Angeles Department of Water and Power	19.3 TWh	132
#22	Nevada Power Company	38.6 TWh	143
#51	PUD No. 1 of Douglas County	4.4 TWh	5
#19	Salt River Project Agricultural Improvement and Power District	60.5 TWh	51
#57	Turlock Irrigation District	1.9 TWh	11
#39	Western Area Power Administration - Desert Southwest Region	10.6 TWh	36

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	506.3 TWh	1,487
#5	Southwest Power Pool	314.5 TWh	876
#6	Southern Company Services, Inc. - Trans	259.3 TWh	423
#7	California Independent System Operator	168.7 TWh	2,170
#9	Tennessee Valley Authority	166.2 TWh	209
#10	Florida Power & Light Co.	153.0 TWh	188
#12	New York Independent System Operator	134.1 TWh	1,334
#13	Duke Energy Carolinas	113.4 TWh	578
#15	ISO New England	112.2 TWh	1,667
#16	Bonneville Power Administration	91.1 TWh	170