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37.5 MW Natural Gas Fired Combustion Turbine (10 MW) + Natural Gas Steam Turbine (28 MW) operating in New London, CT — ISO New England Inc.
37.5 MW
Nameplate Capacity
4
Generators
units
Hybrid (2)
Technology
Natural Gas Fired Combustion Turbine + Natural Gas Steam Turbine
1952
Operating Since
Coordinates
41.3315, -72.0786
County
New London, CT
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Pfizer Inc | — | — |
| Owner(s) | Pfizer Inc | — | — |
| Status | Operating | — | — |
The Pfizer Groton Plant, located in New London County, Connecticut, is a 37.5 MW hybrid power plant owned and operated by Pfizer Inc. The plant began operating in 1952 and utilizes natural gas as its primary fuel source. It consists of four generators employing both natural gas-fired combustion turbine and natural gas steam turbine technologies.
The plant operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region. In the most recent year with available data, the Pfizer Groton Plant generated 75,037 MWh of electricity, achieving a capacity factor of 22.9%. The plant is ranked as the 12th largest in Connecticut out of 49 power plants, and nationally it is ranked 1201 out of 1963.
Generated from EIA, GEM, and public data sources
ISO/RTO
ISO-NE
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
ISO New England Inc. (ISNE)
Grid Voltage
34.5 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Commercial
Sector
Industrial CHP
5.4K MWh
Latest Month
75.0K MWh
Annual Generation
22.9%
Capacity Factor
CO₂ Intensity
634 lb/MWh
NOx
1 lb/MWh
SO₂
0.009 lb/MWh
CH₄
0.013 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
22.2%
Annual Net Gen
73 GWh
CO₂eq
635 lb/MWh
Subregion
NPCC New England
2013
$965/kW
Est. Construction Cost
Total estimated cost: $36.2M
Market Position
ISO/RTO Market
ISO-NE
LMP Node
LD.NLONDNCT115
Pricing Hub
.Z.CONNECTICUT
Location Type
NETWORK NODE
Node Source
Curated node match
Last updated 2026-03-14
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