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
Gilroy Power Plant	Calpine Gilroy Cogen LP	Gilroy, CA	21 GWh	Sep 1987	Dec 2025	Natural Gas
Alpaugh North	RWE Clean Energy	Alpaugh, CA	21 GWh	Nov 2012	Dec 2025	Solar
Anheuser Busch - Fairfield	Bloom Energy	Fairfield, CA	21 GWh	Nov 2022	Dec 2025	Natural Gas
De Sabla	Pacific Gas & Electric Co.	Magalia, CA	21 GWh	Jan 1963	Dec 2025	Water
Tracy 210	Costco Wholesale	Tracy, CA	21 GWh	Feb 2019	Dec 2025	Natural Gas
Cottonwood Solar, LLC (City of Corcoran)	Onward Energy	Corcoran, CA	21 GWh	Apr 2015	Dec 2025	Solar
Western Power & Steam Inc	Western Power and Steam II LLC	Bakersfield, CA	21 GWh	Feb 1990	Jul 2026	Natural Gas
Power Generation Station (PGS) 2	East Bay Municipal Util Dist - (CA)	Oakland, CA	20 GWh	Nov 2011	Dec 2025	Other Biomass Gas
CCCSD Wastewater Treatment Plnt	Central Contra Costa Sanitary District	Martinez, CA	20 GWh	Nov 1995	Jul 2026	Natural Gas
Little Bear 3	Little Bear Solar 3, LLC (Longroad)	Mendota, CA	20 GWh	Nov 2020	Dec 2025	Solar
TLR000 Hansen Fuel Cell	2016 ESA Project Company, LLC	Salinas, CA	20 GWh	Aug 2018	Dec 2025	Natural Gas
El Cajon Energy Center	Wellhead Services, Inc	El Cajon, CA	20 GWh	May 2010	Dec 2025	Natural Gas
Giffen Solar Park	Giffen Solar Park, LLC	Cantua Creek, CA	20 GWh	May 2017	Dec 2025	Solar
Aera San Ardo Cogen Facility	Aera Energy LLC-San Ardo	San Ardo, CA	20 GWh	Jun 1989	Dec 2025	Natural Gas
GEN005 Antibody Fuel Cell	2016 ESA Project Company, LLC	Oceanside, CA	19 GWh	Mar 2019	Dec 2025	Natural Gas
EQX010 Great Oaks Fuel Cell	2016 ESA Project Company, LLC	San Jose, CA	19 GWh	Aug 2019	Dec 2025	Natural Gas
BCE Los Alamitos 1	Bright Canyon Energy	Los Alamitos, CA	19 GWh	Jul 2023	Dec 2024	Solar
Redwood 4 Solar Farm	54 KR 8me LLC	Edison, CA	19 GWh	Nov 2017	Dec 2025	Solar
CalTech - Pasadena Wilson Ave	Bloom Energy	Pasadena, CA	19 GWh	Nov 2019	Dec 2025	Natural Gas
CM10	RWE Clean Energy	Boulder City, NV	18 GWh	Nov 2008	Dec 2025	Solar
West Point PH	Pacific Gas & Electric Co.	Pioneer, CA	18 GWh	Oct 1948	Dec 2025	Water
San Manuel Central Plant Cogens	Yuhaaviatam of San Manuel Nation	Highland, CA	18 GWh	May 2021	Dec 2025	Natural Gas
Adelanto Solar II, LLC	Adelanto Solar II, LLC	Adelanto, CA	18 GWh	Jun 2015	Dec 2025	Solar
Ormond Beach	Ormond Beach Power, LLC	Oxnard, CA	18 GWh	Jul 1971	Jul 2026	Natural Gas
Live Oak Limited	WCAC Operating Company	Bakersfield, CA	18 GWh	Feb 1992	Jul 2026	Natural Gas
Kaiser East La Palma Ave. Fuel Cell	2016 ESA Project Company, LLC	Anaheim, CA	18 GWh	Aug 2017	Dec 2025	Natural Gas
Foundation Dole Fresh Vegetables	Foundation CA Fund X Manager LLC	Soledad, CA	18 GWh	Jul 2022	Dec 2025	Wind
Cymric 31X Cogen	Chevron USA Inc	McKittrick, CA	17 GWh	Sep 1988	Dec 2025	Natural Gas
Spaulding 1	Pacific Gas & Electric Co.	Emigrant Gap, CA	17 GWh	Apr 1928	Dec 2025	Water
AGT000 Stevens Creek Fuel Cell	2016 ESA Project Company, LLC	Santa Clara, CA	17 GWh	Aug 2018	Dec 2025	Natural Gas
Cove Hydroelectric	Snow Mountain Hydro LLC	Burney, CA	17 GWh	Jan 1990	Dec 2025	Water
Haypress	EIF Haypress LLC	Sierra City, CA	17 GWh	Nov 1988	Jun 2025	Water
Camanche	East Bay Municipal Util Dist - (CA)	Clements & Wallace, CA	17 GWh	Jun 1983	Dec 2025	Water
Riverside Energy Resource Center	City of Riverside - (CA)	Riverside, CA	17 GWh	May 2006	Nov 2025	Natural Gas
Spaulding 3	Pacific Gas & Electric Co.	Emigrant Gap, CA	17 GWh	Jan 1929	Dec 2025	Water
Fresno Community Solar	Agilitas Energy, Inc.	Fresno, CA	17 GWh	May 2024	Dec 2025	Solar
Garnet Wind Energy Center	Terra-Gen Operating Co-Wind	North Palm Springs, CA	17 GWh	May 2009	Dec 2025	Wind
Lemoore West	Leprino Foods	Lemoore, CA	17 GWh	Nov 2022	Dec 2025	Solar
Sierra Pacific Industries (2042-RD)	Sierra Pacific Industries	Red Bluff, CA	17 GWh	Apr 2020	Dec 2025	Solar
Kaiser - Harbor City	Bloom Energy	Harbor City, CA	17 GWh	Nov 2019	Dec 2025	Natural Gas
Deer Creek Hybrid	Deer Creek Solar I, LLC	Terra Bella, CA	17 GWh	-	Jul 2026	Solar
KSR028 Merced Fuel Cell	2016 ESA Project Company, LLC	San Leandro, CA	16 GWh	Mar 2018	Dec 2025	Natural Gas
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%
MM Yolo Power	Yolo County Community Services Department	Woodland, CA	16 GWh	Sep 1990	Dec 2025	Landfill Gas
Apple Campus 2 PV	Apple, Inc	Cupertino, CA	16 GWh	May 2017	Dec 2025	Solar
Orion Solar II	Orion Solar II, LLC	Arvin, CA	16 GWh	May 2014	Dec 2025	Solar
CED Avenal	RWE Clean Energy	Avenal, CA	16 GWh	Dec 2016	Dec 2025	Solar
Ameresco Keller Canyon	AMERESCO Keller Canyon LLC	Bay Point, CA	16 GWh	Jun 2009	Dec 2025	Landfill Gas
ABEC Bidart-Old River LLC	ABEC Bidart-Old River LLC	Bakersfield, CA	16 GWh	Nov 2013	Dec 2025	Other Biomass Gas
Algonquin SKIC 10 Solar, LLC	Algonquin Power Co	Taft, CA	16 GWh	Dec 2016	Dec 2025	Solar
Equinix Douglas St. Fuel Cell	2016 ESA Project Company, LLC	El Segundo, CA	15 GWh	Aug 2017	Dec 2025	Natural Gas
Collins Pine Project	Collins Pine Co	Chester, CA	15 GWh	Nov 1985	Dec 2025	Wood/Wood Waste Solids
Olsen	Olsen Power Partners	Whitmore, CA	15 GWh	Dec 1989	Dec 2025	Water
Deer Creek PH	Nevada Irrigation District	Nevada City, CA	15 GWh	Apr 1908	Dec 2025	Water
Dutch Flat 2	Nevada Irrigation District	Dutch Flat, CA	15 GWh	Oct 1965	Dec 2025	Water
Drum 1	Pacific Gas & Electric Co.	Alta, CA	15 GWh	Oct 1913	Dec 2025	Water
Gianera	City of Santa Clara - (CA)	Santa Clara, CA	15 GWh	May 1986	Dec 2025	Natural Gas
Stroud Solar Station	Pacific Gas & Electric Co.	Helm, CA	15 GWh	Aug 2011	Dec 2025	Solar
Berrenda Mesa Water District	The Greater Light USA LLC	Lost Hills, CA	15 GWh	Jun 2023	Nov 2025	Solar
Murphys	Utica Water & Power Authority	Murphys, CA	15 GWh	Feb 1954	Dec 2025	Water
Ameresco Butte County	Ameresco Butte County LLC	Paradise, CA	15 GWh	Jan 2013	Dec 2025	Landfill Gas
Yuba City Cogen Partners	Wellhead Services, Inc	Yuba City, CA	15 GWh	Nov 1990	Dec 2025	Natural Gas
Enloe Medical - Chico	Bloom Energy	Chico, CA	15 GWh	May 2021	Dec 2025	Natural Gas
Spicer Meadow Project	Northern California Power Agny	Murphys, CA	14 GWh	Oct 1989	Dec 2025	Water
Temescal	Metropolitan Water District of S CA	Corona, CA	14 GWh	Jun 1983	Apr 2025	Water
Encina Water Pollution Control	Encina Joint Powers Authority	Carlsbad, CA	14 GWh	Oct 2008	Jul 2026	Other Biomass Gas : 94.0% Natural Gas : 6.0%
Sacramento Municipal Util Dist	South Sutter Water District	Sacramento, CA	14 GWh	Jan 1985	Dec 2025	Water
SCDA Solar 1	SCDA Solar 1, LLC	Sacramento, CA	14 GWh	Sep 2017	Dec 2025	Solar
Naval Hospital Medical Center	Department of the Navy	San Diego, CA	14 GWh	Nov 2003	Jul 2026	Natural Gas
Bowman	Nevada Irrigation District	Nevada City, CA	14 GWh	Aug 1986	Dec 2025	Water
W Plant	Qualcomm Incorporated	San Diego, CA	14 GWh	Jun 2005	Jul 2026	Natural Gas
West Gates Solar Station	Pacific Gas & Electric Co.	Huron, CA	14 GWh	Apr 2013	Dec 2025	Solar
Antelope DSR 2	AES Distributed Energy	Lancaster, CA	14 GWh	Nov 2016	Dec 2025	Solar
Wheeler Ridge 2	Madison Energy Investments LLC	Arvin, CA	14 GWh	Oct 2023	Dec 2025	Solar
Ameresco Santa Cruz Energy	AMERESCO Santa Cruz Energy LLC	Watsonville, CA	14 GWh	Dec 2005	Dec 2025	Landfill Gas
Chowchilla II	California Power Holdings LLC	Chowchilla, CA	14 GWh	May 2001	Dec 2025	Natural Gas
Kyocera International Inc.(San Diego)	Kyocera International, Inc	San Diego, CA	14 GWh	Aug 2012	Dec 2025	Natural Gas
North Kern 3	Madison Energy Investments LLC	Bakersfield, CA	14 GWh	Nov 2023	Dec 2025	Solar
Biola University Hybrid	Biola University	La Mirada, CA	13 GWh	Mar 1990	Jul 2026	Natural Gas
Martinez Sulfuric Acid Regeneration Plt	Eco Services Corp.	Martinez, CA	13 GWh	Dec 1977	Dec 2025	Waste Heat
AES Alamitos LLC	AES Alamitos LLC	Long Beach, CA	13 GWh	Aug 1956	Jun 2026	Natural Gas
Toyota Long Beach Trigen	Long Beach Trigen, LLC	Long Beach, CA	13 GWh	Oct 2023	Dec 2025	Other Biomass Gas
Corona	Metropolitan Water District of S CA	Corona, CA	13 GWh	Jul 1983	Apr 2025	Water
Avenue 26 Solar	RPCA Solar 1, LLC	Chowchilla, CA	13 GWh	Oct 2024	Dec 2025	Solar
Wonderful Orchards - Westside	Wonderful Renewable Energy, LLC.	Lost Hills, CA	13 GWh	Jul 2021	Dec 2025	Solar
Central CA Fuel Cell 1, LLC	Cordia	Tulare, CA	13 GWh	Apr 2018	Dec 2025	Natural Gas
Bishop Creek 2	Southern California Edison Co	Bishop, CA	13 GWh	Oct 1908	Dec 2025	Water
Summer North Solar	AES Distributed Energy	Lancaster, CA	13 GWh	Nov 2014	Dec 2025	Solar
Goal Line LP	Goal Line LP	Escondido, CA	13 GWh	Jul 1994	Jul 2026	Natural Gas
Salka Cabazon Wind	Salka Cabazon Wind LLC	North Palm Springs, CA	13 GWh	Dec 1998	Dec 2025	Wind
G2 Energy Hay Rd	G2 Energy LLC	Vacaville, CA	13 GWh	May 2013	Dec 2025	Landfill Gas
San Antonio Regional Hospital	San Antonio Regional Hospital	Upland, CA	13 GWh	Dec 1984	Dec 2025	Natural Gas
Difwind Farms Ltd VI	Terra-Gen Operating Co-Wind	Mojave, CA	13 GWh	Dec 1986	Dec 2025	Wind
Antelope Expansion 3B	AES Distributed Energy	Lancaster, CA	13 GWh	May 2021	Dec 2025	Solar
Five Points Solar Station	Pacific Gas & Electric Co.	Five Points, CA	13 GWh	Aug 2011	Dec 2025	Solar
Wheeler Ridge	Agilitas Energy, Inc.	Bakersfield, CA	13 GWh	Aug 2023	Dec 2025	Solar
KSR053 Cantara Fuel Cell	2016 ESA Project Company, LLC	Panorama City, CA	12 GWh	Apr 2018	Dec 2025	Natural Gas
Wonderful Orchards - Belridge	Wonderful Renewable Energy, LLC.	Lost Hills, CA	12 GWh	Nov 2020	Dec 2025	Solar
Riverview Energy Center	Gilroy Energy Center for Riverview	Antioch, CA	12 GWh	Apr 2003	Dec 2025	Natural Gas
Lake Mendocino	City of Ukiah - (CA)	Ukiah, CA	12 GWh	Apr 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