ISO New England
Balancing Authority Summary Information
ISO New England is ranked #15 out of 64 balancing authorities in terms of total annual electricity generation.
| Balancing Authority | ISO New England |
|---|---|
| States | Connecticut Maine Massachusetts New Hampshire New York Rhode Island Vermont |
| Last Update | Jul 2026 |
| Annual Generation | 111.1 TWh |
| Power Plants | 1,629 |
| Utilities | 833 |
| Ranked #15 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 | 54.9% Nuclear | 25% Wind | 5.1% Water | 4.5% Other Fuel | 4.4% Solar | 1.6% Coal | 0.1% |
Map of ISO New England
Register Now for Comprehensive Access
Subscribe now to access all power plant data, utility information, FERC EQR data, and more for ISO New England.
Daily Net Generation for ISO New England for the past 3 Years
| Plant Name | Utility | Location | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|
| Cape Cod Air Force Station - 6 SWS | US Space Force | Sagamore, MA | 6 GWh | Dec 2013 | May 2026 | Wind |
| Valley Sun Solar | Valley Sun Solar LLC | Grand Isle, ME | 3 GWh | Nov 2024 | Dec 2025 | Solar |
| FedEx Middletown | VCP Realty, LLC | Middletown, CT | 2 GWh | Oct 2024 | Dec 2025 | Solar |
| VPPSA Project 10 | Vermont Public Power Supply Authority | Swanton, VT | 1 GWh | Apr 2010 | Dec 2025 | Distillate Fuel Oil |
| W K Sanders | Village of Morrisville - (VT) | Hyde Park, VT | 716 MWh | Jun 1983 | Nov 2025 | Water |
| Cadys Falls | Village of Morrisville - (VT) | Morrisville, VT | 2 GWh | Jul 1914 | Dec 2025 | Water |
| Morrisville | Village of Morrisville - (VT) | Morrisville, VT | 5 GWh | Jul 1924 | Dec 2025 | Water |
| Highgate Falls | Village of Swanton - (VT) | Highgate, VT | 32 GWh | Jul 1923 | Dec 2025 | Water |
| West Tisbury Generating Facility | Vineyard Reliability LLC | West Tisbury, MA | 5 GWh | Dec 1974 | Sep 2025 | Distillate Fuel Oil |
| Oak Bluffs Diesel Generating Facility | Vineyard Reliability LLC | Oak Bluffs, MA | 3 GWh | Dec 1968 | Sep 2025 | Distillate Fuel Oil |
| Vineyard Wind 1 | Vineyard Wind 1 LLC | Edgartown, MA | 363 GWh | - | May 2026 | Wind |
| Hopkinton Phase 2 | Vista Solar, Inc. | Ashaway, RI | 4 GWh | Aug 2020 | Dec 2025 | Solar |
| Wachusett Solar | Wachusett Solar, LLC | Rutland, MA | 3 GWh | Jul 2019 | Dec 2025 | Solar |
| Walden Solar Maine V | Walden Solar Maine V LLC | Leeds, ME | 36 GWh | Nov 2024 | Dec 2025 | Solar |
| Wallingford Energy | Wallingford Energy LLC | Wallingford, CT | 107 GWh | Jul 2001 | Dec 2025 | Natural Gas |
| Wallingford Solar | Wallingford Renewable Energy, LLC | Wallingford, CT | 15 GWh | Aug 2021 | Dec 2025 | Solar |
| Walpole Solar 2 | Walpole Solar 2, LLC | Walpole, MA | 4 GWh | Mar 2014 | Dec 2025 | Solar |
| Ware Palmer Road Solar LLC CSG | Ware Palmer Road Solar LLC | Ware, MA | 5 GWh | May 2021 | Dec 2024 | Solar |
| Wrightsville Hydro Plant | Washington Electric Coop - (VT) | Montpelier, VT | 374 MWh | Aug 1985 | Dec 2025 | Water |
| Coventry Clean Energy Corporation | Washington Electric Coop - (VT) | Coventry, VT | 57 GWh | Jun 2005 | Dec 2025 | Landfill Gas |
| Waterside Power, LLC | Waterside Power, LLC | Stamford, CT | 2 GWh | May 2003 | Dec 2025 | Distillate Fuel Oil |
| Brimfield | WEB Brimfield Solar LLC | Brimfield, MA | 3 GWh | Nov 2021 | Dec 2025 | Solar |
| WEB Brookfield | WEB Brookfield Solar LLC | Brookfield, MA | 6 GWh | Nov 2021 | Dec 2025 | Solar |
| Silver Maple | WEB Silver Maple Wind LLC | Clifton, ME | 64 GWh | Sep 2022 | Dec 2025 | Wind |
| Webster Solar | Webster Solar, LLC | Webster, MA | 1 GWh | Nov 2017 | Dec 2025 | Solar |
| WED Coventry 4 | WED Coventry Four, LLC | Coventry, RI | 3 GWh | Jul 2016 | Dec 2025 | Wind |
| WED Coventry 1 | WED Coventry One, LLC | Coventry, RI | 3 GWh | Sep 2016 | Dec 2025 | Wind |
| WED Coventry Seven, LLC | WED Coventry Seven, LLC | Coventry, RI | 5 GWh | Nov 2020 | Dec 2025 | Solar |
| WED Coventry 3 | WED Coventry Three, LLC | Coventry, RI | 3 GWh | Jul 2016 | Dec 2025 | Wind |
| WED Coventry 2 | WED Coventry Two, LLC | Coventry, RI | 9 GWh | Jul 2016 | May 2026 | Wind |
| WED Green Hill, LLC | WED Green Hill, LLC | Johnston, RI | 6 GWh | Dec 2018 | May 2026 | Wind |
| WED NK Green | WED NK Green LLC | North Kingstown, RI | 3 GWh | Feb 2012 | Dec 2025 | Wind |
| WED Plainfield II, LLC | WED Plainfield II, LLC | Johnston, RI | 8 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Plainfield III, LLC | WED Plainfield III, LLC | Johnston, RI | 7 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Plainfield, LLC | WED Plainfield, LLC | Johnston, RI | 7 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Shun I, LLC | WED Shun I, LLC | Johnston, RI | 7 GWh | Dec 2018 | May 2026 | Wind |
| WED Shun II, LLC | WED Shun II, LLC | Johnston, RI | 7 GWh | Dec 2018 | Dec 2025 | Wind |
| WED Shun III, LLC | WED Shun III, LLC | Johnston, RI | 8 GWh | Dec 2018 | Dec 2025 | Wind |
| Wellesley College Central Utility Plant | Wellesley College | Wellesley, MA | 10 GWh | May 1985 | Dec 2025 | Natural Gas |
| Wendell MA 1 | Wendell MA 1 LLC | Wendell, MA | 1 GWh | Nov 2018 | Dec 2025 | Solar |
| Wesleyan University Cogen 1 | Wesleyan University | Middletown, CT | 4 GWh | Jan 2009 | Dec 2025 | Natural Gas |
| Bates College Skowhegan | Westbound Solar 3, LLC | Skowhegan, ME | 8 GWh | Aug 2023 | Dec 2025 | Solar |
| Overlook | Westbound Solar 3, LLC | Westminster, MA | 7 GWh | Feb 2023 | Dec 2025 | Solar |
| Niagara Bottling - Bloomfield | Westbound Solar 3, LLC | Bloomfield, CT | 4 GWh | Oct 2022 | Dec 2025 | Solar |
| Westbrook Energy Center Power Plant | Westbrook Energy Center | Westbrook, ME | 4 TWh | Apr 2001 | May 2026 | Natural Gas |
| Silver Lake Solar Photovoltaic Facility | Western Massachusetts Electric Company | Pittsfield, MA | 2 GWh | Nov 2010 | Dec 2025 | Solar |
| Cottage Street Solar Facility | Western Massachusetts Electric Company | Springfield, MA | 4 GWh | Apr 2014 | May 2026 | Solar |
| Indian Orchard PV Facility | Western Massachusetts Electric Company | Springfield, MA | 2 GWh | Nov 2011 | Dec 2025 | Solar |
| Westminster Renewables, LLC CSG | Westminster Renewables, LLC | Westminster, MA | 2 GWh | Sep 2018 | Dec 2025 | Solar |
| Whatley Renewables | Whatley Renewables, LLC | Whatley, MA | 2 GWh | Sep 2020 | Dec 2025 | Solar |
| Wheelabrator Millbury Facility | Wheelabrator Environmental Systems | Millbury, MA | 288 GWh | Aug 1987 | May 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wheelabrator Lisbon | Wheelabrator Environmental Systems | Lisbon, CT | 101 GWh | Sep 1995 | May 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wheelabrator Saugus | Wheelabrator Environmental Systems | Saugus, MA | 180 GWh | Jul 1985 | May 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wheelabrator Bridgeport | Wheelabrator Environmental Systems | Bridgeport, CT | 430 GWh | Jun 1988 | May 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wheelabrator North Andover | Wheelabrator Environmental Systems | North Andover, MA | 240 GWh | Apr 1985 | May 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| Wheelabrator Concord Facility | Wheelabrator Environmental Systems | Concord, NH | 93 GWh | Mar 1989 | May 2026 | Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0% |
| White Brook Renewables PV | White Brook Renewables LLC | West Greenwich, RI | 7 GWh | Nov 2024 | Dec 2025 | Solar |
| White Rock Road LLC | White Rock Road LLC | Westerly, RI | 11 GWh | Nov 2022 | Dec 2025 | Solar |
| Wilmarth Solar | Wilmarth Lane Solar 1, LLC | Plainville, MA | 8 GWh | Jan 2020 | Dec 2024 | Solar |
| Wind Colebrook South | Wind Colebrook South | Colebrook, CT | 11 GWh | Oct 2015 | May 2026 | Wind |
| New Milford Gas Recovery | WM Renewable Energy LLC | New Milford, CT | 4 GWh | Apr 2008 | Dec 2025 | Landfill Gas |
| Turnkey Landfill Gas Recovery | WM Renewable Energy LLC | Rochester, NH | 39 GWh | Jan 1992 | Dec 2025 | Landfill Gas |
| Fitchburg Gas Recovery | WM Renewable Energy LLC | Westminster, MA | 32 GWh | Sep 2007 | Dec 2025 | Landfill Gas |
| Waste Management Crossroads LFGTE | WM Renewable Energy LLC | Norridgewock, ME | 22 GWh | Feb 2009 | Dec 2025 | Landfill Gas |
| Woodland Avenue Solar 1 | Woodland Avenue Solar 1, LLC | Seekonk, MA | 9 GWh | Jul 2020 | Dec 2025 | Solar |
| Woods Hill Solar | Woods Hill Solar, LLC | Pomfret, CT | 22 GWh | Nov 2018 | May 2026 | Solar |
| Mainely Solar (Wyman Hill Solar LLC) | Wyman Hill Solar, LLC | Rumford, ME | 6 GWh | Nov 2022 | Dec 2025 | Solar |
Surrounding Balancing Authorities
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #61 | Alcoa Power Generating, Inc. - Yadkin Division | 442.5 GWh | 4 |
| #24 | Dominion Energy South Carolina, Inc. | 25.3 TWh | 83 |
| #13 | Duke Energy Carolinas | 112.6 TWh | 577 |
| #17 | Duke Energy Progress East | 64.5 TWh | 565 |
| #50 | Duke Energy Progress West | 4.5 TWh | 15 |
| #23 | Louisville Gas and Electric Company and Kentucky Utilities Company | 33.9 TWh | 25 |
| #12 | New York Independent System Operator | 134.3 TWh | 1,299 |
| #1 | PJM Interconnection, LLC | 882.8 TWh | 2,652 |
| #31 | South Carolina Public Service Authority | 18.5 TWh | 35 |
| #59 | Southeastern Power Administration | 1.3 TWh | 11 |
Balancing Authorities with Similar Net Generation
| Rank | Balancing Authority | Annual Net Generation | # Power Plants |
|---|---|---|---|
| #7 | California Independent System Operator | 169.4 TWh | 2,135 |
| #9 | Tennessee Valley Authority | 163.4 TWh | 207 |
| #10 | Florida Power & Light Co. | 152.2 TWh | 187 |
| #12 | New York Independent System Operator | 134.3 TWh | 1,299 |
| #13 | Duke Energy Carolinas | 112.6 TWh | 577 |
| #15 | ISO New England | 111.1 TWh | 1,629 |
| #16 | Bonneville Power Administration | 91.6 TWh | 167 |
| #17 | Duke Energy Progress East | 64.5 TWh | 565 |
| #18 | PacifiCorp East | 60.9 TWh | 222 |
| #19 | Salt River Project Agricultural Improvement and Power District | 60.3 TWh | 49 |