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	May 2025
Annual Generation	189.5 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 \| 43.6% Solar \| 24.8% Water \| 11.6% Wind \| 10.8% 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
Lost Hills Cogeneration Plant	AERA Energy LLC	Lost Hills, CA	3 GWh	Sep 1985	Dec 2023	Natural Gas
Valley View	Metropolitan Water District of S CA	Yorba Linda, CA	1 GWh	Oct 1985	Dec 2022	Water
Painted Hills Wind Park	Terra-Gen Operating Co-Wind	Whitewater, CA	173 GWh	Oct 1985	Feb 2025	Wind
ZCO	Wind Stream Operations LLC	Tehachapi, CA	1 GWh	Nov 1985	Dec 2023	Wind
Geothermal 2	Northern California Power Agny	Middletown, CA	340 GWh	Nov 1985	Feb 2025	Geothermal
Sunray 3	Sunray Energy 3 LLC	Daggett, CA	33 GWh	Nov 1985	Dec 2023	Solar
Collins Pine Project	Collins Pine Co	Chester, CA	8 GWh	Nov 1985	Nov 2023	Wood/Wood Waste Solids
Nove Power Plant	Nove Investments I LLC	Richmond, CA	35 MWh	Nov 1985	Dec 2022	Landfill Gas
South Belridge Cogeneration Facility	AERA Energy LLC	McKittrick, CA	477 GWh	Nov 1985	Feb 2025	Natural Gas
Total Energy Facilities	Los Angeles County Sanitation	Carson, CA	169 GWh	Dec 1985	Dec 2023	Other Biomass Gas : 79.6% Natural Gas : 20.4%
Lodi	Northern California Power Agny	Lodi, CA	546 MWh	Jan 1986	Dec 2023	Natural Gas
Oxnard Paper Mill	New-Indy, Oxnard LLC	Oxnard, CA	193 GWh	Feb 1986	Feb 2025	Natural Gas
San Dimas Wash Generating Station	San Gabriel Valley Mun Wtr Dt	San Dimas, CA	3 GWh	Feb 1986	Dec 2023	Water
Toadtown	Pacific Gas & Electric Co.	Magalia, CA	3 GWh	Mar 1986	Dec 2023	Water
Stony Gorge	City of Santa Clara - (CA)	Elk Creek, CA	13 GWh	Mar 1986	Dec 2023	Water
Whitewater Hydro Plant	Desert Water Agency	California, CA	3 GWh	Mar 1986	Dec 2023	Water
Rock Creek LP	Hydroland Omega LLC	Placerville, CA	1 GWh	Mar 1986	Apr 2023	Water
Alameda	Northern California Power Agny	Alameda, CA	4 GWh	Apr 1986	Dec 2023	Natural Gas
Sand Bar Power Plant	Tri-Dam Power Authority	Stanislaus Ntl. Fores, CA	124 GWh	Apr 1986	Dec 2023	Water
Bear Valley	City of Escondido - (CA)	Escondido, CA	3 GWh	May 1986	Dec 2023	Water
Gianera	City of Santa Clara - (CA)	Santa Clara, CA	10 GWh	May 1986	Dec 2023	Natural Gas
Alamo	California Dept. of Water Resources	Pearblossom, CA	91 GWh	Jun 1986	Dec 2023	Water
Cymric 6Z Cogen	Chevron USA Inc	McKittrick, CA	37 GWh	Jun 1986	Dec 2023	Natural Gas
Bowman	Nevada Irrigation District	Nevada City, CA	15 GWh	Aug 1986	Dec 2023	Water
Coalinga 25D Cogen	Chevron USA Inc	Coalinga, CA	67 GWh	Sep 1986	Dec 2023	Natural Gas
Puente Hills Energy Recovery	Los Angeles County Sanitation	Whittier, CA	159 GWh	Sep 1986	Feb 2025	Landfill Gas
Pacific-Ultrapower Chinese Station	IHI Power Services Corp	Jamestown, CA	144 GWh	Sep 1986	Feb 2025	Wood/Wood Waste Solids : 99.6%
Sierra Pacific Burney Facility	Sierra Pacific Industries	Burney, CA	94 GWh	Sep 1986	Dec 2023	Wood/Wood Waste Solids
Newcastle	Pacific Gas & Electric Co.	Auburn, CA	17 GWh	Nov 1986	Dec 2023	Water
Helzel & Schwarzhoff 86	Wind Stream Operations LLC	Tehachapi, CA	3 GWh	Nov 1986	Dec 2023	Wind
TPC Windfarms LLC	Terra-Gen Operating Co-Wind	Mojave, CA	39 GWh	Nov 1986	Dec 2023	Wind
Berry Cogen Tanne Hills 18	Berry Petroleum Co	Maricopa, CA	138 GWh	Nov 1986	Feb 2025	Natural Gas
Roaring Creek Water Power	Shasta Hydroelectric Inc	Montgomery Creek, CA	7 GWh	Nov 1986	Aug 2023	Water
Hatchet Creek Project	Mega Renewables	Montgomery Creek, CA	21 GWh	Nov 1986	Jul 2023	Water
Sierra Pacific Quincy Facility	Sierra Pacific Industries	Quincy, CA	171 GWh	Nov 1986	Dec 2023	Wood/Wood Waste Solids
Berry Cogen	Berry Petroleum Co	Taft, CA	14 GWh	Nov 1986	Feb 2025	Natural Gas
H. Gonzales	City of Vernon	Vernon, CA	298 MWh	Dec 1986	Dec 2023	Natural Gas
Montgomery Creek Hydro	Central Rivers Power US, LLC	Montgomery Creek, CA	8 GWh	Dec 1986	Dec 2023	Water
Difwind Farms Ltd VI	Terra-Gen Operating Co-Wind	Mojave, CA	15 GWh	Dec 1986	Dec 2023	Wind
Big Creek Water Works	Big Creek Water Works Ltd	Hyampom, CA	12 GWh	Dec 1986	Feb 2025	Water
East Portal Generator	Calleguas Mun Water District	Chatsworth, CA	4 GWh	Dec 1986	Dec 2023	Water
Marathon Bay Area Cogen	Tesoro Marketing & Refining Co. LLC (Martinez)	Martinez, CA	699 GWh	Jan 1987	Feb 2025	Natural Gas
Bidwell Ditch Project	Mega Renewables	Hat Creek, CA	11 GWh	Feb 1987	Dec 2023	Water
SRI International Cogen Project	IPT SRI Cogeneration Inc	Menlo Park, CA	25 GWh	Mar 1987	Feb 2025	Natural Gas
Lake Mendocino	City of Ukiah - (CA)	Ukiah, CA	11 GWh	Apr 1987	Dec 2023	Water
Phillips 66 Rodeo Refinery	Phillips 66 Company	Rodeo, CA	291 GWh	Apr 1987	Aug 2024	Other Gas : 72.8% Natural Gas : 27.2%
PE Berkeley	Berkeley Cogeneration Facility	Berkeley, CA	157 GWh	May 1987	Feb 2025	Natural Gas
Thermalito Diverson Dam	California Dept. of Water Resources	Oroville, CA	16 GWh	Jun 1987	Dec 2023	Water
Coso Finance Partners	Coso Operating Co LLC	Inyokern, CA	372 GWh	Jun 1987	Feb 2025	Geothermal
Nacimiento Hydro Project	Monterey Cnty Water Res Agency	Bradley, CA	19 GWh	Jun 1987	Nov 2023	Water
Gilroy Power Plant	Calpine Gilroy Cogen LP	Gilroy, CA	75 GWh	Sep 1987	Nov 2023	Natural Gas
Wheelabrator Shasta	Shasta Sustainable Resource Management, Inc.	Anderson, CA	276 GWh	Sep 1987	Feb 2025	Wood/Wood Waste Solids
J S Eastwood	Southern California Edison Co	Shaver Lake, CA	8 GWh	Nov 1987	Feb 2025	Water
Stockton Biomass	DTE Stockton LLC	Stockton, CA	326 GWh	Nov 1987	Dec 2023	Wood/Wood Waste Solids : 99.6%
San Gabriel Hydro Project	Los Angeles County-San Gabriel	Azusa, CA	8 GWh	Nov 1987	May 2023	Water
OLS Energy Chino	OLS Energy-Chino	Chino, CA	11 GWh	Nov 1987	Dec 2023	Natural Gas
Watson Cogeneration	ARCO Products Co-Watson	Carson, CA	2 TWh	Nov 1987	Feb 2025	Natural Gas : 84.2% Other Gas : 15.5%
El Segundo Cogen	Chevron USA Inc-El Segundo	El Segundo, CA	1 TWh	Nov 1987	Feb 2025	Natural Gas : 99.7%
Sycamore Cogeneration	Sycamore Cogeneration Co	Bakersfield, CA	273 GWh	Nov 1987	Feb 2025	Natural Gas
CSUCI Site Authority	CSUCI Site Authority	Camarillo, CA	3 GWh	Feb 1988	Sep 2024	Natural Gas
AltaGas Ripon Energy Inc.	AltaGas Ripon Energy Inc.	Ripon, CA	3 GWh	Mar 1988	Feb 2025	Natural Gas
Dinosaur Point	International Turbine Res Inc	Los Banos, CA	8 GWh	Apr 1988	Dec 2023	Wind
Kern River Eastridge Cogen	Chevron USA Inc	Bakersfield, CA	226 GWh	May 1988	Feb 2025	Natural Gas
Dixie Valley	Ormat Nevada Inc	Fallon, NV	309 GWh	May 1988	Feb 2025	Geothermal
Coalinga Cogeneration Facility	Aera Energy LLC-Coalinga	Coalinga, CA	44 GWh	May 1988	Dec 2023	Natural Gas
Southeast Resource Recovery	SERRF Joint Powers Authority	Long Beach, CA	90 GWh	Jun 1988	Mar 2024	Non-biogenic Municipal Solid Waste : 51.7% Biogenic Municipal Solid Waste : 42.3% Natural Gas : 6.1%
Rio Bravo Fresno	Rio Bravo Fresno	Fresno, CA	145 GWh	Jun 1988	Dec 2023	Wood/Wood Waste Solids : 97.0% Natural Gas : 3.0%
Monterey One Water	Monterey One Water	Marina, CA	8 GWh	Jul 1988	Dec 2023	Other Biomass Gas : 81.7% Natural Gas : 18.3%
Dome Project	Sentinel Peak Resources California, LLC	Fellows, CA	49 GWh	Jul 1988	Dec 2023	Natural Gas
Black Butte	City of Santa Clara - (CA)	Orland, CA	20 GWh	Aug 1988	Dec 2023	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	37 GWh	Sep 1988	Dec 2023	Natural Gas
Muck Valley Hydroelectric	Brookfield Renewable Trading and Marketing LP	NA, CA	83 GWh	Nov 1988	Dec 2023	Water
Haypress	EIF Haypress LLC	Sierra City, CA	22 GWh	Nov 1988	Aug 2023	Water
Coso Energy Developers	Coso Operating Co LLC	Inyokern, CA	277 GWh	Nov 1988	Dec 2023	Geothermal
Harbor Cogen	Harbor Cogeneration Co.	Wilmington, CA	26 GWh	Nov 1988	Dec 2023	Natural Gas
Kern Front Limited	WCAC Operating Company	Bakersfield, CA	22 GWh	Jan 1989	Dec 2023	Natural Gas
King City Power Plant	Calpine King City Cogen LLC	King City, CA	42 GWh	Jan 1989	Feb 2025	Natural Gas
Southeast Kern River Cogen	Chevron USA Inc	Bakersfield, CA	59 GWh	Jan 1989	Feb 2025	Natural Gas
Greenleaf 1	Calpine Greenleaf Holding, Inc.	Yuba City, CA	3 GWh	Jan 1989	Dec 2023	Natural Gas
High Sierra Limited	WCAC Operating Company	Bakersfield, CA	23 GWh	Feb 1989	Dec 2023	Natural Gas
Wadham Energy LP	Wadham Energy Ltd Partners	Williams, CA	74 GWh	Feb 1989	Dec 2023	Agricultural By-Products : 99.5% Natural Gas : 0.5%
Double C Generation Limited Partnership	WCAC Operating Company	Bakersfield, CA	23 GWh	Feb 1989	Dec 2023	Natural Gas
New Hogan Power Plant	Modesto Irrigation District	Valley Springs, CA	11 GWh	Mar 1989	Dec 2023	Water
Mt Poso Cogeneration	Mt Poso Cogeneration Co	Bakersfield, CA	268 GWh	Apr 1989	Sep 2023	Wood/Wood Waste Solids : 99.5% Natural Gas : 0.5%
Midway Sunset Cogen	Midway-Sunset Cogeneration Co	Fellows, CA	273 GWh	Apr 1989	Feb 2025	Natural Gas
Aidlin Geothermal Power Plant	Geysers Power Co LLC	Middletown, CA	77 GWh	Apr 1989	Dec 2023	Geothermal
Rio Bravo Hydro Project	Olcese Water District	Bakersfield, CA	31 GWh	Apr 1989	Dec 2023	Water
Rio Bravo Rocklin	Rio Bravo Rocklin	Lincoln, CA	147 GWh	May 1989	Dec 2023	Wood/Wood Waste Solids : 98.8% Natural Gas : 1.2%
Solano County Cogen Plant	Solano County	Fairfield, CA	8 GWh	May 1989	Dec 2023	Natural Gas
HL Power	HL Power Company	Wendel, CA	205 GWh	Jun 1989	Dec 2023	Wood/Wood Waste Solids : 99.7%
Aera San Ardo Cogen Facility	Aera Energy LLC-San Ardo	San Ardo, CA	24 GWh	Jun 1989	Dec 2023	Natural Gas
Woodland Biomass Power Ltd	DTE Energy Services-Woodland	Woodland, CA	172 GWh	Aug 1989	Dec 2023	Wood/Wood Waste Solids : 99.6%
Greenleaf 2 Power Plant	Greenleaf Energy LLC	Yuba City, CA	30 GWh	Sep 1989	Dec 2024	Natural Gas
Nelson Creek	Nelson Creek Power Inc	Big Bend, CA	3 GWh	Sep 1989	Dec 2023	Water
Burney Forest Products	Burney Forest Products, A Joint Venture	Burney, CA	187 GWh	Sep 1989	Dec 2023	Wood/Wood Waste Solids : 96.1% Natural Gas : 3.9%
Spicer Meadow Project	Northern California Power Agny	Murphys, CA	30 GWh	Oct 1989	Dec 2023	Water
Coso Power Developers	Coso Operating Co LLC	Inyokern, CA	309 GWh	Oct 1989	Feb 2025	Geothermal
Collierville Powerhouse	Northern California Power Agny	Murphys, CA	533 GWh	Oct 1989	Feb 2025	Water
Kekawaka Power House	Eagle Creek Renewable Energy, LLC	Mirinda, CA	8 GWh	Nov 1989	Dec 2022	Water

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#27	Arizona Public Service Company	22.7 TWh	75
#55	Arlington Valley, LLC	3.3 TWh	1
#36	Balancing Authority of Northern California	15.0 TWh	83
#48	Imperial Irrigation District	5.8 TWh	65
#33	Los Angeles Department of Water and Power	17.4 TWh	120
#22	Nevada Power Company	38.1 TWh	136
#54	New Harquahala Generating Company, LLC	3.6 TWh	1
#18	Salt River Project Agricultural Improvement and Power District	58.5 TWh	45
#58	Turlock Irrigation District	2.1 TWh	11
#42	Western Area Power Administration - Desert Southwest Region	8.3 TWh	30

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	474.5 TWh	1,139
#5	Southwest Power Pool	296.3 TWh	762
#6	Southern Company Services, Inc. - Trans	252.3 TWh	393
#7	California Independent System Operator	189.5 TWh	1,943
#8	Tennessee Valley Authority	158.9 TWh	170
#10	Florida Power & Light Co.	148.5 TWh	159
#12	New York Independent System Operator	130.9 TWh	1,100
#13	Duke Energy Carolinas	111.3 TWh	556
#15	ISO New England	103.6 TWh	1,487
#16	Bonneville Power Administration	83.0 TWh	158