Pfizer Groton Plant
Natural gas power plant in New London County, Connecticut. 37.5 MW of nameplate capacity across 4 generators, operated by Pfizer Inc.
Also known as EIA plant 54236
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 37.5 MWNameplate
- Generators
- 4 operatingEIA-860M, August 2026
- Operating since
- January 1952First generator online
- Operator
- Pfizer IncEIA operator ID 14928
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- None linkedNo verified ISO node
- Location
- New London County, CT41.3315, −72.0786
- EIA plant ID
- 54236EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Pfizer Groton Plant produces
Free · EIA-923Net generation, 2025
75.0 GWh
75,037 MWh, final
Capacity factor, 2025
22.8%
2024: 23.6%
January to July 2026
49.9 GWh
Provisional
Range, 2017 to 2025
75.0–87.2
GWh a year. Low 2025, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 91,629 | Not reported | 12 of 12 |
| 2002 | 101,842 | Not reported | 12 of 12 |
| 2003 | 94,199 | Not reported | 12 of 12 |
| 2004 | 90,212 | Not reported | 12 of 12 |
| 2005 | 76,479 | Not reported | 12 of 12 |
| 2006 | 64,767 | Not reported | 12 of 12 |
| 2007 | 62,457 | Not reported | 12 of 12 |
| 2008 | 41,188 | Not reported | 12 of 12 |
| 2009 | 70,418 | Not reported | 9 of 12 |
| 2010 | 81,436 | 30.8% | 9 of 12 |
| 2011 | 81,678 | 30.9% | 9 of 12 |
| 2012 | 69,752 | 26.4% | 9 of 12 |
| 2013 | 84,808 | 24.2% | 12 of 12 |
| 2014 | 75,820 | 21.6% | 12 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | Not reported | Not reported | 0 of 12 |
| 2017 | 87,195 | 26.5% | 12 of 12 |
| 2018 | Not reported | Not reported | 0 of 12 |
| 2019 | Not reported | Not reported | 0 of 12 |
| 2020 | 86,975 | 26.4% | 12 of 12 |
| 2021 | 75,932 | 23.1% | 12 of 12 |
| 2022 | 75,196 | 22.9% | 12 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | 77,685 | 23.6% | 12 of 12 |
| 2025 | 75,037 | 22.8% | 12 of 12 |
| 2026 (provisional, partial year) | 49,863 | 26.1% | 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 accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GT-1 | Natural Gas Fired Combustion Turbine | 10.0 | September 2009 |
| TG 3 | Natural Gas Steam Turbine | 10.0 | January 1952 |
| TG 4 | Natural Gas Steam Turbine | 10.0 | January 1994 |
| TG5 | Natural Gas Steam Turbine | 7.5 | August 2001 |
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 Pfizer Inc 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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Questions about Pfizer Groton Plant
How much power does Pfizer Groton Plant produce?
Pfizer Groton Plant reported 75,037 MWh (75.0 GWh) of net generation in 2025, a 22.8% capacity factor on 37.5 MW of nameplate capacity. From January to July 2026 it reported 49.9 GWh, which is provisional.
Where is Pfizer Groton Plant?
Pfizer Groton Plant is in New London County, Connecticut, at 41.3315, −72.0786. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Pfizer Groton Plant?
EIA-860M for August 2026 lists Pfizer Inc as the operator (EIA operator ID 14928). The operator is not always the owner.
When did Pfizer Groton Plant start operating?
Its first generator began operating in January 1952, according to EIA-860M.
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)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page