Stony Brook
Oil and natural gas power plant in Hampden County, Massachusetts. 537.5 MW of nameplate capacity across 8 generators, operated by Massachusetts Mun Wholes Electric Co.
Also known as Stony Brook Power Plant · EIA plant 6081
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 537.5 MWOil 275.6 · Natural gas 255.0 · Solar 6.9
- Generators
- 8 operatingEIA-860M, August 2026
- Operating since
- November 1981First generator online
- Operator
- Massachusetts Mun Wholes Electric CoEIA operator ID 11806
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 6 ISONE nodesResource nodes with prices
- Location
- Hampden County, MA42.1978, −72.5106
- EIA plant ID
- 6081EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Stony Brook produces
Free · EIA-923Net generation, 2025
104 GWh
103,956 MWh, final
Capacity factor, 2025
Not reported
2024: 1.0%
January to July 2026
113 GWh
Provisional
Range, 2015 to 2025
22.1–216.4
GWh a year. Low 2023, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 34,028 | Not reported | 12 of 12 |
| 2001 | 32,178 | Not reported | 12 of 12 |
| 2002 | 665,593 | Not reported | 12 of 12 |
| 2003 | 576,103 | Not reported | 12 of 12 |
| 2004 | 269,224 | Not reported | 12 of 12 |
| 2005 | 199,616 | Not reported | 12 of 12 |
| 2006 | 307,029 | Not reported | 12 of 12 |
| 2007 | 237,923 | Not reported | 11 of 12 |
| 2008 | 171,027 | Not reported | 12 of 12 |
| 2009 | 118,659 | Not reported | 12 of 12 |
| 2010 | 317,452 | Not reported | 12 of 12 |
| 2011 | 152,455 | Not reported | 12 of 12 |
| 2012 | 127,244 | 2.7% | 12 of 12 |
| 2013 | 114,583 | Not reported | 12 of 12 |
| 2014 | 195,235 | 4.2% | 12 of 12 |
| 2015 | 216,378 | 4.6% | 12 of 12 |
| 2016 | 109,645 | 2.3% | 12 of 12 |
| 2017 | 99,022 | 2.1% | 12 of 12 |
| 2018 | 110,102 | 2.4% | 12 of 12 |
| 2019 | 46,274 | 1.0% | 12 of 12 |
| 2020 | 96,562 | Not reported | 12 of 12 |
| 2021 | 54,734 | 1.2% | 12 of 12 |
| 2022 | 110,102 | 2.3% | 12 of 12 |
| 2023 | 22,067 | Not reported | 12 of 12 |
| 2024 | 47,713 | 1.0% | 12 of 12 |
| 2025 | 103,956 | Not reported | 12 of 12 |
| 2026 (provisional, partial year) | 112,828 | Not reported | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · ISONEEmissions
Free · EPA CAMPDCO₂, 2025
66,431
US short tons. 2024: 35,814
SO₂, 2025
Not reported
US short tons
NOx, 2025
169
US short tons
CO₂ per MWh, calculated
0.64 t
About 1,278 lb per MWh
5 of 5 EPA units reported CO₂ in 2025 (1, 2, 3, 4, 5), matched to EIA plant 6081 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
39
million gallons
Consumption, 2024
33
million gallons
Source
Municipal
Discharge, Reclaimed. Induced-draft tower
Watershed stress
Very low/none · 0.108
USGS SUI, HUC12 Outlet Chicopee River
12 of 12 cooling months report withdrawal. Reclaimed water or plant effluent; not tested. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Petroleum Liquids | 85.0 | November 1982 |
| 2 | Petroleum Liquids | 85.0 | November 1982 |
| 5051S | Solar Photovoltaic | 6.9 | June 2018 |
| CA1 | Petroleum Liquids | 105.0 | November 1981 |
| CT1 | Natural Gas Fired Combined Cycle | 85.0 | November 1981 |
| CT2 | Natural Gas Fired Combined Cycle | 85.0 | November 1981 |
| CT3 | Natural Gas Fired Combined Cycle | 85.0 | November 1981 |
| EDSI | Petroleum Liquids | 0.6 | November 1981 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Massachusetts Mun Wholes Electric Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Stony Brook
More plants operated by Massachusetts Mun Wholes Electric Co
Questions about Stony Brook
How much power does Stony Brook produce?
Stony Brook reported 103,956 MWh (104 GWh) of net generation in 2025. From January to July 2026 it reported 113 GWh, which is provisional.
Where is Stony Brook?
Stony Brook is in Hampden County, Massachusetts, at 42.1978, −72.5106. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Stony Brook?
EIA-860M for August 2026 lists Massachusetts Mun Wholes Electric Co as the operator (EIA operator ID 11806). The operator is not always the owner.
Is Stony Brook a oil or a natural gas plant?
Both. Oil capacity totals 275.6 MW and natural gas capacity totals 255 MW, with 6.9 MW of solar.
When did Stony Brook start operating?
Its first generator began operating in November 1981, according to EIA-860M.
Does InfraMap have power prices for Stony Brook?
Yes. InfraMap has ISONE day-ahead and real-time prices at 6 price nodes linked to Stony Brook, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- ISONE day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page