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%

Map of California Independent System Operator

Register Now for Comprehensive Access

Subscribe now to access all power plant data, utility information, FERC EQR data, and more for California Independent System Operator.

Create Your Account Today

Daily Net Generation for California Independent System Operator for the past 3 Years

Download Generation

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
San Dimas	Metropolitan Water District of S CA	San Dimas, CA	10 GWh	May 1981	Sep 2025	Water
Rollins	Nevada Irrigation District	Colfax, CA	37 GWh	Jul 1980	Dec 2025	Water
Lake Mathews	Metropolitan Water District of S CA	Riverside, CA	6 GWh	Jul 1980	Oct 2025	Water
Volta 1	Pacific Gas & Electric Co.	Manton, CA	21 GWh	Mar 1980	Dec 2025	Water
Loma Linda University Cogen	Loma Linda University	Loma Linda, CA	61 GWh	Jan 1980	Jul 2026	Natural Gas
South	Pacific Gas & Electric Co.	Manton, CA	11 GWh	Nov 1979	Dec 2025	Water
Coleman PH	Pacific Gas & Electric Co.	Anderson, CA	31 GWh	May 1979	Dec 2025	Water
Dynegy Oakland Power Plant	Dynegy Oakland, LLC	Oakland, CA	2 GWh	Oct 1978	May 2026	Jet Fuel
Martinez Sulfuric Acid Regeneration Plt	Eco Services Corp.	Martinez, CA	13 GWh	Dec 1977	Dec 2025	Waste Heat
Long Beach Generation	Long Beach Generation LLC	Long Beach, CA	6 GWh	Nov 1976	Dec 2025	Natural Gas
Dominguez Plant	Eco Services Corp.	Long Beach, CA	34 GWh	Jul 1976	Dec 2025	Waste Heat
Glenarm	City of Pasadena - (CA)	Pasadena, CA	130 GWh	Dec 1975	Dec 2025	Natural Gas
Ellwood	Ellwood Power, LLC	Goleta, CA	305 MWh	Jul 1974	Dec 2025	Natural Gas
Wellhead Power Panoche	Wellhead Services, Inc	Firebaugh, CA	7 GWh	Jul 1973	Dec 2025	Natural Gas
Devil Canyon	California Dept. of Water Resources	San Bernardino, CA	736 GWh	Nov 1972	Jul 2026	Water
Ormond Beach	Ormond Beach Power, LLC	Oxnard, CA	18 GWh	Jul 1971	Jul 2026	Natural Gas
Geysers Unit 5-20	Geysers Power Co LLC	Middletown, CA	4 TWh	Mar 1971	Jul 2026	Geothermal
Narrows 2	Yuba County Water Agency - (CA)	Browns Valley, CA	181 GWh	Nov 1969	Dec 2025	Water
Colgate	Yuba County Water Agency - (CA)	Dobbins, CA	1 TWh	Sep 1969	Oct 2025	Water
Belden	Pacific Gas & Electric Co.	Belden, CA	430 GWh	Aug 1969	Jul 2026	Water
Moccasin	City & County of San Francisco - (CA)	Moccasin, CA	305 GWh	Jul 1969	Jul 2026	Water
Altamont Gas Recovery	WM Renewable Energy LLC	Livermore, CA	39 GWh	Feb 1969	Dec 2025	Landfill Gas
Edward C Hyatt	California Dept. of Water Resources	Oroville, CA	2 TWh	Feb 1968	Jul 2026	Water
Thermalito	California Dept. of Water Resources	Oroville, CA	309 GWh	Jan 1968	Jul 2026	Water
Dynegy Moss Landing Power Plant Hybrid	Dynegy -Moss Landing LLC	Moss Landing, CA	2 TWh	Nov 1967	Jul 2026	Natural Gas
Exchequer	Merced Irrigation District	Snelling, CA	246 GWh	Jun 1967	Dec 2025	Water
McSwain	Merced Irrigation District	Snelling, CA	27 GWh	Jun 1967	Oct 2025	Water
R C Kirkwood	City & County of San Francisco - (CA)	Groveland, CA	478 GWh	Jan 1967	Jul 2026	Water
French Meadows	Placer County Water Agency - (CA)	Foresthill, CA	43 GWh	Sep 1966	Dec 2025	Water
Middle Fork	Placer County Water Agency - (CA)	Foresthill, CA	459 GWh	Sep 1966	Jul 2026	Water
Oxbow (CA)	Placer County Water Agency - (CA)	Foresthill, CA	23 GWh	Sep 1966	Dec 2025	Water
Ralston	Placer County Water Agency - (CA)	Foresthill, CA	303 GWh	Sep 1966	Dec 2025	Water
Drum 2	Pacific Gas & Electric Co.	Alta, CA	164 GWh	Nov 1965	Dec 2025	Water
James B Black	Pacific Gas & Electric Co.	Big Bend, CA	504 GWh	Nov 1965	Jul 2026	Water
Chicago Park	Nevada Irrigation District	Colfax, CA	65 GWh	Oct 1965	Dec 2025	Water
Dutch Flat 2	Nevada Irrigation District	Dutch Flat, CA	15 GWh	Oct 1965	Dec 2025	Water
Pit 7	Pacific Gas & Electric Co.	Montgomery Creek, CA	366 GWh	Aug 1965	Jul 2026	Water
Pit 6	Pacific Gas & Electric Co.	Montgomery Creek, CA	262 GWh	Jul 1965	Dec 2025	Water
Chili Bar	Sacramento Municipal Util Dist	Placerville, CA	25 GWh	Feb 1965	Dec 2025	Water
Woodleaf	South Feather Water and Power Agency	Forbestown, CA	167 GWh	Oct 1963	Dec 2025	Water
Forbestown	South Feather Water and Power Agency	Forbestown, CA	115 GWh	Sep 1963	Dec 2025	Water
Kelly Ridge	South Feather Water and Power Agency	Oroville, CA	69 GWh	Aug 1963	Dec 2025	Water
Stanislaus	Pacific Gas & Electric Co.	Vallecito, CA	200 GWh	Feb 1963	Dec 2025	Water
De Sabla	Pacific Gas & Electric Co.	Magalia, CA	21 GWh	Jan 1963	Dec 2025	Water
Kings River PH	Pacific Gas & Electric Co.	Balch Camp, CA	81 GWh	Feb 1962	Dec 2025	Water
Dion R Holm	City & County of San Francisco - (CA)	Groveland, CA	552 GWh	Jul 1960	Jul 2026	Water
Mammoth Pool	Southern California Edison Co	North Fork, CA	574 GWh	Feb 1960	Jul 2026	Water
Butt Valley	Pacific Gas & Electric Co.	Belden, CA	145 GWh	Nov 1958	Dec 2025	Water
Haas	Pacific Gas & Electric Co.	Balch Camp, CA	174 GWh	Nov 1958	Jul 2026	Water
Balch 2	Pacific Gas & Electric Co.	Balch Camp, CA	342 GWh	Oct 1958	Dec 2025	Water
Caribou 2	Pacific Gas & Electric Co.	Belden, CA	491 GWh	Oct 1958	Jul 2026	Water
Poe	Pacific Gas & Electric Co.	Storrie, CA	197 GWh	Sep 1958	Jul 2026	Water
Pebbly Beach Generating Station Hybrid	Southern California Edison Co	Avalon, CA	28 GWh	Jun 1958	Jul 2026	Distillate Fuel Oil : 95.4% Gaseous Propane : 4.6%
AES Huntington Beach LLC	AES Huntington Beach LLC	Huntington Beach, CA	5 GWh	May 1958	Jun 2026	Natural Gas
Tulloch	Oakdale&South San Joaquin Irrigation D.	Jamestown, CA	103 GWh	May 1958	Dec 2025	Water
C&H Sugar Plant	C&H Sugar Company Inc	Crockett, CA	36 GWh	Sep 1957	Jul 2026	Purchased Steam
Donnells	Oakdale&South San Joaquin Irrigation D.	None, CA	233 GWh	May 1957	Dec 2025	Water
Beardsley	Oakdale&South San Joaquin Irrigation D.	None, CA	56 GWh	Apr 1957	Dec 2025	Water
Portal	Southern California Edison Co	Lakeshore, CA	26 GWh	Nov 1956	Dec 2025	Water
AES Alamitos LLC	AES Alamitos LLC	Long Beach, CA	13 GWh	Aug 1956	Jun 2026	Natural Gas
Pit 4	Pacific Gas & Electric Co.	Big Bend, CA	342 GWh	Jun 1955	Jul 2026	Water
Murphys	Utica Water & Power Authority	Murphys, CA	15 GWh	Feb 1954	Dec 2025	Water
SJ/SC WPCP	San Jose/Santa Clara Water P C	San Jose, CA	67 GWh	Jan 1953	Jul 2026	Natural Gas : 54.3% Other Biomass Gas : 45.6%
Big Creek 4	Southern California Edison Co	North Fork, CA	404 GWh	May 1951	Jul 2026	Water
Rock Creek	Pacific Gas & Electric Co.	Storrie, CA	438 GWh	Feb 1950	Jul 2026	Water
Cresta	Pacific Gas & Electric Co.	Storrie, CA	342 GWh	Oct 1949	Dec 2025	Water
West Point PH	Pacific Gas & Electric Co.	Pioneer, CA	18 GWh	Oct 1948	Dec 2025	Water
Electra	Pacific Gas & Electric Co.	Jackson, CA	257 GWh	May 1948	Jul 2026	Water
Argus Cogen Plant	Searles Valley Minerals Operations Inc.	Trona, CA	154 GWh	Nov 1947	Jul 2026	Bituminous Coal : 71.3% Natural Gas : 28.7%
Pit 5	Pacific Gas & Electric Co.	Big Bend, CA	211 GWh	Mar 1944	Jul 2026	Water
Dutch Flat	Pacific Gas & Electric Co.	Alta, CA	66 GWh	Feb 1943	Dec 2025	Water
Narrows PH	Yuba County Water Agency - (CA)	Grass Valley, CA	73 GWh	Nov 1942	Dec 2025	Water
Phoenix	Pacific Gas & Electric Co.	Sonora, CA	5 GWh	Jan 1940	Dec 2025	Water
Angels	Utica Water & Power Authority	Angels Camp, CA	6 GWh	Dec 1939	Dec 2025	Water
Humboldt Sawmill Company	Mendocino Forest Products	Scotia, CA	119 GWh	Dec 1937	Jul 2026	Wood/Wood Waste Solids : 99.8%
Salt Springs	Pacific Gas & Electric Co.	Pioneer, CA	113 GWh	May 1931	Dec 2025	Water
Tiger Creek	Pacific Gas & Electric Co.	Pioneer, CA	216 GWh	May 1931	Dec 2025	Water
Merced Falls	Merced Irrigation District	Snelling, CA	9 GWh	Jun 1930	Sep 2025	Water
Pardee	East Bay Municipal Util Dist - (CA)	Valley Springs, CA	80 GWh	Jun 1930	Dec 2025	Water
Spaulding 3	Pacific Gas & Electric Co.	Emigrant Gap, CA	17 GWh	Jan 1929	Dec 2025	Water
Big Creek 2A	Southern California Edison Co	Auberry, CA	325 GWh	Jul 1928	Jul 2026	Water
Spaulding 2	Pacific Gas & Electric Co.	Emigrant Gap, CA	21 MWh	Jun 1928	Nov 2025	Water
Spaulding 1	Pacific Gas & Electric Co.	Emigrant Gap, CA	17 GWh	Apr 1928	Dec 2025	Water
Bucks Creek	Pacific Gas & Electric Co.	Storrie, CA	192 GWh	Feb 1928	Dec 2025	Water
Balch 1	Pacific Gas & Electric Co.	Balch Camp, CA	71 GWh	Jan 1927	Dec 2025	Water
Pit 3	Pacific Gas & Electric Co.	Burney, CA	375 GWh	Jun 1925	Dec 2025	Water
Poole	Southern California Edison Co	Lee Vining, CA	22 GWh	Apr 1924	Dec 2025	Water
El Dorado	El Dorado Irrigation District	Pollock Pines, CA	81 GWh	Dec 1923	Dec 2025	Water
Big Creek 3	Southern California Edison Co	Auberry, CA	760 GWh	Aug 1923	Jul 2026	Water
Pit 1	Pacific Gas & Electric Co.	Burney, CA	256 GWh	Aug 1922	Dec 2025	Water
Hat Creek 2	Pacific Gas & Electric Co.	Burney, CA	46 GWh	Aug 1921	Dec 2025	Water
Spring Gap	Pacific Gas & Electric Co.	Long Barn, CA	12 GWh	Aug 1921	Dec 2025	Water
Hat Creek 1	Pacific Gas & Electric Co.	Burney, CA	32 GWh	Jul 1921	Dec 2025	Water
Big Creek 8	Southern California Edison Co	Auberry, CA	152 GWh	Jul 1921	Dec 2025	Water
Caribou 1	Pacific Gas & Electric Co.	Belden, CA	276 GWh	May 1921	Dec 2025	Water
Kern River 3	Southern California Edison Co	Kernville, CA	143 GWh	Feb 1921	Dec 2025	Water
Bishop Creek 5	Southern California Edison Co	Bishop, CA	11 GWh	May 1919	Dec 2025	Water
Fontana	Southern California Edison Co	Rialto, CA	2 GWh	Nov 1917	Nov 2025	Water
Wise	Pacific Gas & Electric Co.	Auburn, CA	30 GWh	Feb 1917	Dec 2025	Water
Halsey	Pacific Gas & Electric Co.	Auburn, CA	22 GWh	Nov 1916	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