New York Independent System Operator

Balancing Authority Summary Information

New York Independent System Operator is ranked #12 out of 64 balancing authorities in terms of total annual electricity generation.

Balancing Authority	New York Independent System Operator
States	New Jersey New York
Last Update	Oct 2026
Annual Generation	134.1 TWh
Power Plants	1,334
Utilities	620
Ranked #12 out of 64 in terms of net annual generation
Ranked #9 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 54.2% Nuclear \| 19.4% Water \| 18.3% Wind \| 5.2% Other Fuel \| 2.9%

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Daily Net Generation for New York Independent System Operator for the past 3 Years

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Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Prospect	Erie Boulevard Hydropower LP	Prospect, NY	55 GWh	Dec 1958	Dec 2025	Water
Dunn Paper	BiOrigin Specialty Products	Gouverneur, NY	5 GWh	Dec 1958	Dec 2025	Water
Arthur Kill Generating Station	Arthur Kill Power, LLC	Staten Island, NY	1 TWh	Aug 1959	Jul 2026	Natural Gas
Mt. Sinai- Morningside	Mt. Sinai- Morningside	New York, NY	26 MWh	Dec 1959	Dec 2025	Distillate Fuel Oil
St. Joseph Hospital	St. Joseph Hospital (NY)	Yonkers, NY	10 MWh	Dec 1959	Dec 2025	Distillate Fuel Oil
Robert Moses Niagara	New York Power Authority	Lewiston, NY	14 TWh	Dec 1960	Jul 2026	Water
East Hampton	National Grid Generation LLC	East Hampton, NY	11 GWh	Nov 1962	Dec 2025	Distillate Fuel Oil
Ravenswood	Ravenswood Operations LLC	Long Island, NY	3 TWh	Jan 1963	Jul 2026	Natural Gas : 84.6% Distillate Fuel Oil : 15.4%
South Hampton	National Grid Generation LLC	Southampton, NY	181 MWh	Feb 1963	Dec 2025	Distillate Fuel Oil
Southold	National Grid Generation LLC	Greenport, NY	483 MWh	Jul 1964	Dec 2025	Distillate Fuel Oil
Shoreham	National Grid Generation LLC	Wading River, NY	1 GWh	Mar 1966	Dec 2025	Distillate Fuel Oil
Northport	National Grid Generation LLC	Northport, NY	4 TWh	Feb 1967	Jul 2026	Natural Gas : 88.3% Residual Fuel Oil : 11.7%
Glenwood Landing	National Grid Generation LLC	Glenwood Landing, NY	137 GWh	Mar 1967	Dec 2025	Natural Gas : 93.7% Distillate Fuel Oil : 6.3%
Harris Lake	New York State Elec & Gas Corp	Town of Newcomb, NY	243 MWh	Aug 1967	Dec 2025	Distillate Fuel Oil
St Johns Riverside Hospital	St Johns Riverside Hospital	Yonkers, NY	16 MWh	Dec 1967	Dec 2025	Distillate Fuel Oil
74th Street	Consolidated Edison Co-NY Inc	New York, NY	54 MWh	Sep 1968	Dec 2025	Kerosene
59th Street	Consolidated Edison Co-NY Inc	New York, NY	101 MWh	May 1969	Dec 2025	Natural Gas
Coxsackie	Central Hudson Gas & Elec Corp	Coxsackie, NY	1 GWh	Nov 1969	Dec 2025	Natural Gas : 77.6% Kerosene : 22.4%
Nine Mile Point Nuclear Station	Constellation Nuclear	Lycoming, NY	16 TWh	Nov 1969	Jul 2026	Nuclear
Ticonderoga Mill	Sylvamo North America LLC	Ticonderoga, NY	210 GWh	Dec 1969	Jul 2026	Natural Gas : 54.9% Black Liquor : 36.7% Residual Fuel Oil : 4.8% Wood/Wood Waste Solids : 3.6%
The Mount Sinai Hospital	Mount Sinai Hospital	New York, NY	372 MWh	May 1970	Dec 2025	Distillate Fuel Oil
R E Ginna Nuclear Power Plant	Constellation Nuclear	Ontario, NY	5 TWh	Jun 1970	Jul 2026	Nuclear
Gowanus Gas Turbines Generating	Astoria Generating Company, L.P.	Brooklyn, NY	61 GWh	May 1971	Dec 2025	Natural Gas : 86.8% Distillate Fuel Oil : 13.2%
Woodhull Hospital	Woodhull Hospital	Brooklyn, NY	159 MWh	Dec 1971	Dec 2025	Distillate Fuel Oil
Saint Catherine of Siena Medical Center	Saint Catherine of Siena Medical Center	Smithtown, NY	16 MWh	Dec 1971	Dec 2025	Distillate Fuel Oil
Narrows Gas Turbines Generating	Astoria Generating Company, L.P.	Brooklyn, NY	145 GWh	Apr 1972	Dec 2025	Natural Gas : 95.2% Distillate Fuel Oil : 4.8%
Glenwood	National Grid Generation LLC	Glenwood Landing, NY	5 GWh	May 1972	Dec 2025	Distillate Fuel Oil
Hillburn	Alliance NYGT, LLC	Hillburn, NY	701 MWh	Jun 1972	Dec 2025	Natural Gas
Shoemaker	Alliance NYGT, LLC	Middletown, NY	639 MWh	Jun 1972	Dec 2025	Natural Gas
Bowline Point	Bowline, LLC	West Haverstraw, NY	2 TWh	Aug 1972	Jul 2026	Natural Gas : 96.4% Residual Fuel Oil : 3.6%
Plant No 2 Freeport	Village of Freeport - (NY)	Freeport, NY	33 GWh	Apr 1973	Dec 2025	Natural Gas : 97.6% Kerosene : 2.4%
Westchester County Medical Center	Westchester County Medical Center - (NY)	Valhalla, NY	40 MWh	Dec 1973	Dec 2025	Distillate Fuel Oil
Holtsville	National Grid Generation LLC	Holtsville, NY	39 GWh	Jun 1974	Dec 2025	Kerosene
Roseton Generating Facility	CCI Roseton LLC	Newsburgh, NY	684 GWh	Aug 1974	Jul 2026	Natural Gas : 71.4% Residual Fuel Oil : 28.6%
Brooklyn Hospital Center	Brooklyn Hospital Center	Brooklyn, NY	5 MWh	Dec 1974	Dec 2025	Distillate Fuel Oil
Mount Sinai South Nassau Hospital	Mount Sinai South Nassau Hospital	Oceanside, NY	33 MWh	Dec 1974	Dec 2025	Distillate Fuel Oil
Oswego Harbor Power	Oswego Harbor Power	Oswego, NY	123 GWh	May 1975	Jul 2026	Residual Fuel Oil : 96.3% Natural Gas : 3.7%
Montefiore Mount Vernon Hospital	Montefiore Mount Vernon Hospital	Mount Vernon, NY	14 MWh	Dec 1975	Dec 2025	Distillate Fuel Oil
James A Fitzpatrick	Constellation Nuclear	Lycoming, NY	7 TWh	Jul 1976	Jul 2026	Nuclear
Lower Beaver Falls Project	Eagle Creek Renewable Energy, LLC	Beaver Falls, NY	3 GWh	Nov 1979	Dec 2025	Water
Good Samaritan Hospital	Good Samaritan Hospital	Suffern, NY	23 MWh	Dec 1979	Dec 2025	Distillate Fuel Oil : 93.2% Natural Gas : 6.8%
Reworld Niagara I	Reworld Niagara I, LLC	Niagara Falls, NY	174 GWh	Jul 1980	Jul 2026	Non-biogenic Municipal Solid Waste : 50.6% Biogenic Municipal Solid Waste : 41.4% Natural Gas : 8.0%
Cornell Hydro	Cornell Renewable	Ithaca, NY	3 GWh	Nov 1981	Jul 2026	Water
Chasm Hydro Partnership	Ampersand Chasm Hydro LLC	Chateaugay, NY	2 GWh	Feb 1982	Nov 2025	Water
Ashokan	New York Power Authority	Kingston, NY	11 GWh	Oct 1982	Dec 2025	Water
Granby	Erie Boulevard Hydropower LP	Fulton, NY	33 GWh	Dec 1982	Dec 2025	Water
The Bank of New York	The Bank of New York	New York, NY	47 MWh	Dec 1982	Dec 2025	Distillate Fuel Oil
Normanskill Hydro Project	Watervliet, City of - (NY)	Guilderland, NY	1 GWh	Mar 1983	Oct 2025	Water
Montefiore - Westchester Square	Montefiore-Westchester Square	Bronx, NY	13 MWh	Jun 1983	Dec 2025	Distillate Fuel Oil
Upper Mechanicville	New York State Elec & Gas Corp	Town of Stillwater, NY	79 GWh	Aug 1983	Dec 2024	Water
New York University Central Plant	New York University	New York, NY	79 GWh	Dec 1983	Dec 2025	Natural Gas : 96.5% Distillate Fuel Oil : 3.5%
Black River Hydro Associates	Central Rivers Power US, LLC	Port Layden, NY	17 GWh	Dec 1983	Dec 2025	Water
Center Falls	Hollingworth & Vose Co Center Falls	Greenwich, NY	3 GWh	Dec 1983	Dec 2025	Water
Copenhagen Plant	Central Rivers Power US, LLC	Copenhagen, NY	7 GWh	May 1984	Dec 2025	Water
Unionville Hydro Project 2499 NY	Erie Boulevard Hydropower LP	Norwood, NY	11 GWh	Jun 1984	Dec 2025	Water
Lyonsdale Associates	Eagle Creek Renewable Energy, LLC	Lyons Falls, NY	10 GWh	Jun 1984	Dec 2025	Water
Hewittville Hydroelectric	Erie Boulevard Hydropower LP	Norwood, NY	12 GWh	Aug 1984	Dec 2025	Water
Wheelabrator Westchester	Wheelabrator Environmental Systems	Peekskill, NY	384 GWh	Sep 1984	Jul 2026	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Fort Miller Hydroelectric Facility	Albany Engineering Corporation	Northumberland, NY	3 GWh	Nov 1984	Dec 2025	Water
Upper Beaver Falls Project	Eagle Creek Renewable Energy, LLC	Beaver Falls, NY	9 GWh	Dec 1984	Dec 2025	Water
Diana Hydroelectric	EONY Generation Limited	Harrisville, NY	5 GWh	Jun 1985	Dec 2025	Water
Dolgeville Hydro	EONY Generation Limited	Dolgeville, NY	11 GWh	Jun 1985	Dec 2025	Water
Valley Falls Hydroelectric Facility	Albany Engineering Corporation	Valley Falls, NY	6 GWh	Jul 1985	Dec 2025	Water
Curtis Palmer Hydroelectric	Palmer Hydroelectric	Corinth, NY	277 GWh	Sep 1985	Dec 2025	Water
Port Leyden Hydroelectric Project	Lyonsdale Hydroelectric Co., Inc.	Port Leyden, NY	4 GWh	Nov 1985	Dec 2025	Water
Talcville	Erie Boulevard Hydropower LP	Edwards, NY	616 MWh	Dec 1985	Dec 2025	Water
Oswego County Energy Recovery	Oswego County - (NY)	Fulton, NY	6 GWh	Jan 1986	Dec 2025	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
US Gypsum Oakfield	U S Gypsum Co	Oakfield, NY	17 GWh	Mar 1986	Dec 2025	Natural Gas
Philadlephia	EONY Generation Limited	Village of Philadelph, NY	9 GWh	Sep 1986	Dec 2025	Water
High Falls	Central Hudson Gas & Elec Corp	High Falls, NY	5 GWh	Nov 1986	Dec 2025	Water
Victory Mills	Central Rivers Power US, LLC	Victory Mills, NY	3 GWh	Nov 1986	Dec 2025	Water
Union Falls	Union Falls Hydro Power LP	Au Sable Forks, NY	10 GWh	Dec 1986	Dec 2025	Water
Little Falls Hydro	Eagle Creek Renewable Energy, LLC	Little Falls, NY	41 GWh	Dec 1986	Dec 2025	Water
Stillwater Reservoir Hydro	Watershed Hydropower Corp	Webb, NY	5 GWh	Dec 1986	Dec 2025	Water
Hampshire Paper	Hampshire Paper Co Inc	Gouverneur, NY	13 GWh	Apr 1987	Dec 2025	Water
Finch Paper	Finch Paper LLC	Glen Falls, NY	105 GWh	May 1987	Dec 2025	Wood Waste Liquids, excluding Black Liquor : 41.2% Natural Gas : 34.5% Wood/Wood Waste Solids : 24.4%
Dutchess Cnty Resource Recovery Facility	Dutchess County RRA - (NY)	Poughkeepsie, NY	34 GWh	Oct 1987	Dec 2025	Non-biogenic Municipal Solid Waste : 52.8% Biogenic Municipal Solid Waste : 43.2% Natural Gas : 4.1%
Moose River	EONY Generation Limited	Lyons Falls, NY	37 GWh	Oct 1987	Dec 2025	Water
Fourth Branch Hydroelectric Facility	Albany Engineering Corporation	Waterford, NY	13 GWh	Nov 1987	Dec 2025	Water
Hollow Dam Power Partnership	Ampersand Hollow Dam Hydro LLC	Gouveneur, NY	1 GWh	Nov 1987	Dec 2025	Water
Lachute Hydro Lower	Central Rivers Power US, LLC	Ticonderoga, NY	8 GWh	Nov 1987	Dec 2025	Water
Lachute Hydro Upper	Central Rivers Power US, LLC	Ticonderoga, NY	8 GWh	Nov 1987	Dec 2025	Water
Dahowa Hydro	GR Catalyst Two LLC	Greenwich, NY	10 GWh	Nov 1987	Dec 2025	Water
Newport Hydro	Eagle Creek Renewable Energy, LLC	Newport, NY	6 GWh	Nov 1987	Dec 2025	Water
Ogdensburg	Ampersand Ogdensburg Hydro, LLC	Ogdensburg, NY	4 GWh	Nov 1987	Dec 2025	Water
Mount Sinai Beth Israel	Mount Sinai Beth Israel	New York, NY	15 MWh	Dec 1987	Dec 2025	Distillate Fuel Oil
Cornell University Central Heat	Cornell University - CHP	Ithaca, NY	230 GWh	Jun 1988	Dec 2025	Natural Gas
Kings Falls Hydroelectric	Silverstreet Hydro	Copenhagen, NY	2 GWh	Sep 1988	Dec 2025	Water
Warrensburg Hydroelectric	Boralex Hydro Operations Inc	Warrensburg, NY	9 GWh	Nov 1988	Dec 2025	Water
Wappinger Falls Hydroelectric	Windsor Machinery Co Inc	Wappinger Falls, NY	8 GWh	Nov 1988	Dec 2025	Water
West Delaware Tunnel Plant	Erie Boulevard Hydropower LP	Grahamsville, NY	34 GWh	Nov 1988	Dec 2025	Water
Reworld Babylon Inc	Reworld Babylon Inc	West Babylon, NY	123 GWh	Dec 1988	Jul 2026	Non-biogenic Municipal Solid Waste : 54.5% Biogenic Municipal Solid Waste : 44.6% Distillate Fuel Oil : 0.9%
Covanta Hempstead	Covanta Hempstead Company	Westbury, NY	471 GWh	Mar 1989	Jul 2026	Non-biogenic Municipal Solid Waste : 54.7% Biogenic Municipal Solid Waste : 44.8%
Bethpage Power Plant	Calpine Eastern Corp	Hicksville, NY	819 GWh	Jul 1989	Dec 2025	Natural Gas
Wading River	National Grid Generation LLC	Shoreham, NY	17 GWh	Jul 1989	Dec 2025	Distillate Fuel Oil
Middle Falls Hydro	Boralex Hydro Operations Inc	Middle Falls, NY	9 GWh	Aug 1989	Dec 2025	Water
Indeck Yerkes Energy Center	Indeck-Yerkes Ltd Partnership	Tonawanda, NY	63 GWh	Nov 1989	Dec 2025	Natural Gas
Maimonides Medical Center	Maimonides Medical Center	Brooklyn, NY	15 MWh	Dec 1989	Dec 2025	Distillate Fuel Oil
MacArthur Waste to Energy Facility	Reworld MacArthur Renewable Energy	Ronkonkoma, NY	52 GWh	Feb 1990	Jul 2026	Non-biogenic Municipal Solid Waste : 54.5% Biogenic Municipal Solid Waste : 44.6% Natural Gas : 0.9%
Indeck Oswego Energy Center	Indeck-Oswego Ltd Partnership	Oswego, NY	118 GWh	May 1990	Dec 2025	Natural Gas

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	433.0 GWh	4
#24	Dominion Energy South Carolina, Inc.	26.1 TWh	83
#13	Duke Energy Carolinas	113.4 TWh	578
#17	Duke Energy Progress East	66.2 TWh	574
#50	Duke Energy Progress West	4.6 TWh	15
#15	ISO New England	112.2 TWh	1,667
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	34.2 TWh	25
#1	PJM Interconnection, LLC	890.9 TWh	2,806
#28	South Carolina Public Service Authority	19.6 TWh	35
#59	Southeastern Power Administration	1.2 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#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
#17	Duke Energy Progress East	66.2 TWh	574
#18	PacifiCorp East	61.4 TWh	223