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
Last Update	Jun 2026
Annual Generation	173.0 TWh
Power Plants	2,075
Utilities	965
Ranked #7 out of 64 in terms of net annual generation
Ranked #10 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 36.2% Solar \| 29.3% Water \| 12.2% Wind \| 10.8% Nuclear \| 10.8%

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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
Berry Cogen Tanne Hills 18	Berry Petroleum Co	Maricopa, CA	139 GWh	Nov 1986	Mar 2026	Natural Gas
H. Gonzales	City of Vernon	Vernon, CA	178 MWh	Dec 1986	Dec 2024	Natural Gas
Montgomery Creek Hydro	Central Rivers Power US, LLC	Montgomery Creek, CA	10 GWh	Dec 1986	Dec 2024	Water
Big Creek Water Works	Big Creek Water Works Ltd	Hyampom, CA	7 GWh	Dec 1986	Mar 2026	Water
Difwind Farms Ltd VI	Terra-Gen Operating Co-Wind	Mojave, CA	15 GWh	Dec 1986	Dec 2024	Wind
East Portal Generator	Calleguas Mun Water District	Chatsworth, CA	4 GWh	Dec 1986	Dec 2024	Water
Marathon Bay Area Cogen	Tesoro Marketing & Refining Co. LLC (Martinez)	Martinez, CA	597 GWh	Jan 1987	Mar 2026	Natural Gas
Bidwell Ditch Project	Mega Renewables	Hat Creek, CA	11 GWh	Feb 1987	Dec 2024	Water
SRI International Cogen Project	IPT SRI Cogeneration Inc	Menlo Park, CA	24 GWh	Mar 1987	Mar 2026	Natural Gas
Lake Mendocino	City of Ukiah - (CA)	Ukiah, CA	12 GWh	Apr 1987	Dec 2024	Water
PE Berkeley	Berkeley Cogeneration Facility	Berkeley, CA	150 GWh	May 1987	Mar 2026	Natural Gas
Moccasin Low Head Hydro Project	City & County of San Francisco	Moccasin, CA	4 MWh	Jun 1987	Nov 2024	Water
Thermalito Diverson Dam	California Dept. of Water Resources	Oroville, CA	19 GWh	Jun 1987	Dec 2024	Water
Coso Finance Partners	Coso Operating Co LLC	Inyokern, CA	372 GWh	Jun 1987	Mar 2026	Geothermal
Nacimiento Hydro Project	Monterey Cnty Water Res Agency	Bradley, CA	18 GWh	Jun 1987	Dec 2024	Water
Univ of San Francisco Cogen	University of San Francisco	San Francisco, CA	5 GWh	Aug 1987	Dec 2024	Natural Gas
Gilroy Power Plant	Calpine Gilroy Cogen LP	Gilroy, CA	44 GWh	Sep 1987	Dec 2024	Natural Gas
Wheelabrator Shasta	Shasta Sustainable Resource Management, Inc.	Anderson, CA	283 GWh	Sep 1987	Mar 2026	Wood/Wood Waste Solids
J S Eastwood	Southern California Edison Co	Shaver Lake, CA	96 GWh	Nov 1987	Mar 2026	Water
El Segundo Cogen	Chevron USA Inc-El Segundo	El Segundo, CA	1 TWh	Nov 1987	Mar 2026	Natural Gas : 99.8%
Stockton Biomass	DTE Stockton LLC	Stockton, CA	343 GWh	Nov 1987	Dec 2024	Wood/Wood Waste Solids : 99.5%
Sycamore Cogeneration	Sycamore Cogeneration Co	Bakersfield, CA	140 GWh	Nov 1987	Mar 2026	Natural Gas
Watson Cogeneration	ARCO Products Co-Watson	Carson, CA	2 TWh	Nov 1987	Mar 2026	Natural Gas : 76.7% Other Gas : 22.6% Waste/Other Oil : 0.7%
CamChino Leasing LLC	CamChino Leasing LLC	Chino, CA	7 GWh	Nov 1987	Dec 2024	Natural Gas
AltaGas Ripon Energy Inc.	AltaGas Ripon Energy Inc.	Ripon, CA	1 GWh	Mar 1988	Mar 2026	Natural Gas
Kern River Eastridge Cogen	Chevron USA Inc	Bakersfield, CA	225 GWh	May 1988	Mar 2026	Natural Gas
Coalinga Cogeneration Facility	Aera Energy LLC-Coalinga	Coalinga, CA	36 GWh	May 1988	Dec 2024	Natural Gas
Dixie Valley	Ormat Nevada Inc	Fallon, NV	455 GWh	May 1988	Mar 2026	Geothermal
Rio Bravo Fresno	Rio Bravo Fresno	Fresno, CA	108 GWh	Jun 1988	Oct 2024	Wood/Wood Waste Solids : 94.7% Natural Gas : 5.3%
Monterey One Water	Monterey One Water	Marina, CA	7 GWh	Jul 1988	Dec 2024	Other Biomass Gas : 74.6% Natural Gas : 25.4%
Dome Project	Sentinel Peak Resources California, LLC	Fellows, CA	48 GWh	Jul 1988	Dec 2024	Natural Gas
Black Butte	City of Santa Clara - (CA)	Orland, CA	15 GWh	Aug 1988	Dec 2024	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%
Cymric 31X Cogen	Chevron USA Inc	McKittrick, CA	20 GWh	Sep 1988	Dec 2024	Natural Gas
Muck Valley Hydroelectric	Brookfield Renewable Trading and Marketing LP	NA, CA	82 GWh	Nov 1988	Dec 2024	Water
Coso Energy Developers	Coso Operating Co LLC	Inyokern, CA	244 GWh	Nov 1988	Dec 2024	Geothermal
Harbor Cogen	Harbor Cogeneration Co.	Wilmington, CA	17 GWh	Nov 1988	Dec 2024	Natural Gas
King City Power Plant	Calpine King City Cogen LLC	King City, CA	27 GWh	Jan 1989	Mar 2026	Natural Gas
Greenleaf 1	Calpine Greenleaf Holding, Inc.	Yuba City, CA	4 GWh	Jan 1989	Dec 2024	Natural Gas
Kern Front Limited	WCAC Operating Company	Bakersfield, CA	12 GWh	Jan 1989	Dec 2024	Natural Gas
Southeast Kern River Cogen	Chevron USA Inc	Bakersfield, CA	22 GWh	Jan 1989	Mar 2026	Natural Gas
Wadham Energy LP	Wadham Energy Ltd Partners	Williams, CA	132 GWh	Feb 1989	Dec 2024	Agricultural By-Products : 99.7%
Double C Generation Limited Partnership	WCAC Operating Company	Bakersfield, CA	15 GWh	Feb 1989	Dec 2024	Natural Gas
High Sierra Limited	WCAC Operating Company	Bakersfield, CA	14 GWh	Feb 1989	Dec 2024	Natural Gas
New Hogan Power Plant	Modesto Irrigation District	Valley Springs, CA	9 GWh	Mar 1989	Dec 2024	Water
Mt Poso Cogeneration	Mt Poso Cogeneration Co	Bakersfield, CA	180 GWh	Apr 1989	Nov 2024	Wood/Wood Waste Solids : 99.3% Natural Gas : 0.7%
Rio Bravo Hydro Project	Olcese Water District	Bakersfield, CA	35 GWh	Apr 1989	Oct 2024	Water
Midway Sunset Cogen	Midway-Sunset Cogeneration Co	Fellows, CA	6 GWh	Apr 1989	Mar 2026	Natural Gas
Aidlin Geothermal Power Plant	Geysers Power Co LLC	Middletown, CA	81 GWh	Apr 1989	Dec 2024	Geothermal
Rio Bravo Rocklin	Rio Bravo Rocklin	Lincoln, CA	155 GWh	May 1989	Dec 2024	Wood/Wood Waste Solids : 99.1% Natural Gas : 0.9%
Solano County Cogen Plant	Solano County	Fairfield, CA	8 GWh	May 1989	Dec 2024	Natural Gas
Aera San Ardo Cogen Facility	Aera Energy LLC-San Ardo	San Ardo, CA	17 GWh	Jun 1989	Dec 2024	Natural Gas
HL Power	HL Power Company	Wendel, CA	205 GWh	Jun 1989	Dec 2024	Wood/Wood Waste Solids : 99.8%
Woodland Biomass Power Ltd	DTE Energy Services-Woodland	Woodland, CA	171 GWh	Aug 1989	Dec 2024	Wood/Wood Waste Solids : 99.5% Natural Gas : 0.5%
Greenleaf 2 Power Plant	Greenleaf Energy LLC	Yuba City, CA	51 GWh	Sep 1989	Mar 2026	Natural Gas
Burney Forest Products	Burney Forest Products, A Joint Venture	Burney, CA	193 GWh	Sep 1989	Dec 2024	Wood/Wood Waste Solids : 94.4% Natural Gas : 5.6%
Nelson Creek	Nelson Creek Power Inc	Big Bend, CA	3 GWh	Sep 1989	Dec 2024	Water
Collierville Powerhouse	Northern California Power Agny	Murphys, CA	407 GWh	Oct 1989	Mar 2026	Water
Spicer Meadow Project	Northern California Power Agny	Murphys, CA	22 GWh	Oct 1989	Dec 2024	Water
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	312 GWh	Oct 1989	Mar 2026	Geothermal
Lockhart Solar PV, LLC	Terra-Gen Operating Co-Solar	Hinkley, CA	242 GWh	Nov 1989	Mar 2026	Solar
Lost Creek I	Snow Mountain Hydro LLC	Burney, CA	5 GWh	Nov 1989	Dec 2024	Water
Mojave 16/17/18	Terra-Gen Operating Co-Wind	Mojave, CA	74 GWh	Nov 1989	Dec 2024	Wind
Fresno Cogen Partners	Wellhead Services, Inc	San Joaquin, CA	2 GWh	Dec 1989	Dec 2024	Natural Gas
Oroville Cogeneration LP	Apex Power Generation Corp.	Oroville, CA	672 MWh	Dec 1989	Dec 2024	Natural Gas
EDF Renewable Windfarm V Inc	EDF Renewable Asset Holdings, Inc.	Birds Landing, CA	20 GWh	Dec 1989	Dec 2024	Wind
Bear Creek (CA)	Central Rivers Power US, LLC	Shingletown, CA	7 GWh	Dec 1989	Dec 2024	Water
Olsen	Olsen Power Partners	Whitmore, CA	14 GWh	Dec 1989	Dec 2024	Water
Cove Hydroelectric	Snow Mountain Hydro LLC	Burney, CA	18 GWh	Jan 1990	Dec 2024	Water
Welport Lease Project	Sentinel Peak Resources California, LLC	McKittrick, CA	35 GWh	Feb 1990	Dec 2024	Natural Gas
Western Power & Steam Inc	Western Power and Steam II LLC	Bakersfield, CA	20 GWh	Feb 1990	Mar 2026	Natural Gas
Berry Placerita Cogen	Shadow Wolf Energy	Santa Clarita, CA	4 GWh	Feb 1990	Mar 2026	Natural Gas
Chalk Cliff Limited	WCAC Operating Company	Bakersfield, CA	3 GWh	Feb 1990	Mar 2026	Natural Gas
Ponderosa Bailey Creek	Snow Mountain Hydro LLC	Manton, CA	3 GWh	Feb 1990	Dec 2024	Water
Burney Creek	Snow Mountain Hydro LLC	Burney, CA	9 GWh	Feb 1990	Dec 2024	Water
Biola University Hybrid	Biola University	La Mirada, CA	13 GWh	Mar 1990	Mar 2026	Natural Gas
E F Oxnard Energy Facility	EF Oxnard, LLC	Oxnard, CA	5 GWh	May 1990	Mar 2026	Natural Gas
MM Yolo Power	Yolo County Community Services Department	Woodland, CA	17 GWh	Sep 1990	Dec 2024	Landfill Gas
Agnews Power Plant	OLS Energy-Agnews Inc.	San Jose, CA	10 GWh	Oct 1990	Dec 2024	Natural Gas
Mojave 3/4/5	Terra-Gen Operating Co-Wind	Mojave, CA	133 GWh	Nov 1990	Dec 2024	Wind
Yuba City Cogen Partners	Wellhead Services, Inc	Yuba City, CA	23 GWh	Nov 1990	Dec 2024	Natural Gas
Isabella Hydro Project	Isabella Partners	Lake Isabella, CA	43 GWh	Nov 1990	Dec 2024	Water
Mammoth G2	Ormat Nevada Inc	Mammoth Lakes, CA	82 GWh	Nov 1990	Dec 2024	Geothermal
Mammoth G3	Ormat Nevada Inc	Mammoth Lakes, CA	103 GWh	Nov 1990	Dec 2024	Geothermal
Kingsburg Cogen	KES Kingsburg LP	Kingsburg, CA	11 GWh	Nov 1990	Nov 2024	Natural Gas
City of Tulare Water Facility	City of Tulare Water Pollution Control	Tulare, CA	21 GWh	Dec 1990	Dec 2024	Natural Gas : 62.5% Other Biomass Gas : 21.5% Solar : 16.0%
Sky River Wind Energy Center	Sky River Wind LLC	Tehachapi, CA	245 GWh	Jan 1991	Dec 2024	Wind
Badger Creek Limited	WCAC Operating Company	Bakersfield, CA	5 GWh	Mar 1991	Mar 2026	Natural Gas
McKittrick Limited	WCAC Operating Company	Bakersfield, CA	4 GWh	Sep 1991	Mar 2026	Natural Gas
Salinas River Cogeneration	Salinas River Cogeneration Co	San Ardo, CA	251 GWh	Oct 1991	Mar 2026	Natural Gas
Forks of Butte Hydro Project	Hypower Energy, LLC	Magalia, CA	66 GWh	Feb 1992	Dec 2024	Water
Live Oak Limited	WCAC Operating Company	Bakersfield, CA	20 GWh	Feb 1992	Mar 2026	Natural Gas
Richmond Cogen	Chevron Products Company-Richmond	Richmond, CA	982 GWh	Jul 1992	Mar 2026	Natural Gas : 97.8% Other Gas : 2.2%
Plant No 1 Orange County	Orange County Sanitation Dist	Fountain Valley, CA	40 GWh	May 1993	Dec 2024	Other Biomass Gas : 80.1% Natural Gas : 19.9%
Plant No 2 Orange County	Orange County Sanitation Dist	Huntington Beach, CA	59 GWh	May 1993	Dec 2024	Other Biomass Gas : 73.7% Natural Gas : 26.0%
MM West Covina	MM West Covina Energy LLC	West Covina, CA	31 GWh	May 1993	Dec 2024	Landfill Gas : 99.8%
Sonoma Central Landfill Phase I	County of Sonoma Dept of Trnsp	Petaluma, CA	6 GWh	Jun 1993	Dec 2024	Landfill Gas
Grizzly	City of Santa Clara - (CA)	N/A, CA	30 GWh	Oct 1993	Dec 2024	Water
Springville Hydroelectric	Calleguas Mun Water District	Camarillo, CA	98 MWh	Feb 1994	Dec 2024	Water
Ridgetop	Terra-Gen Operating Co-Wind	Mojave, CA	146 GWh	Mar 1994	Dec 2024	Wind

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#26	Arizona Public Service Company	24.8 TWh	92
#54	Arlington Valley, LLC	3.2 TWh	1
#37	Balancing Authority of Northern California	13.7 TWh	87
#49	Imperial Irrigation District	6.2 TWh	66
#29	Los Angeles Department of Water and Power	18.6 TWh	124
#22	Nevada Power Company	36.3 TWh	139
#19	Salt River Project Agricultural Improvement and Power District	60.1 TWh	48
#38	Tucson Electric Power	13.7 TWh	53
#57	Turlock Irrigation District	1.9 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.	489.5 TWh	1,313
#5	Southwest Power Pool	304.8 TWh	835
#6	Southern Company Services, Inc. - Trans	252.5 TWh	417
#7	California Independent System Operator	173.0 TWh	2,075
#9	Tennessee Valley Authority	163.7 TWh	204
#10	Florida Power & Light Co.	151.0 TWh	187
#12	New York Independent System Operator	134.9 TWh	1,211
#13	Duke Energy Carolinas	112.2 TWh	565
#15	ISO New England	111.3 TWh	1,577
#16	Bonneville Power Administration	90.2 TWh	163