24th largest plant in Connecticut · 3992nd nationally
Pfizer Groton Plant is a natural gas power plant in Connecticut with a nameplate capacity of 37.5 MW. It generates roughly 72.8k MWh per year — enough to power about 6,936 average U.S. homes.
Its capacity factor of 22% reflects intermittent or peaking operation. At 634 lb CO₂/MWh, its emission rate sits below the national grid average of roughly 800 lb/MWh.
Ghost bars are each month's theoretical maximum (37.5 MW nameplate × hours in the month). Filled bars are actual net generation reported to EIA Form 923. The gap between them is capacity factor made visible.
| Plant Name | Pfizer Groton Plant |
|---|---|
| Operator | Pfizer Inc |
| City | Groton |
| County | New London County |
| State | Connecticut |
| ZIP | 06340 |
| Coordinates | 41.33150, -72.07860 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GT-1 | Natural Gas Fired Combustion Turbine | Natural Gas | 10.0 MW | Operating | 2009 |
| TG 3 | Natural Gas Steam Turbine | Natural Gas | 10.0 MW | Operating | 1952 |
| TG 4 | Natural Gas Steam Turbine | Natural Gas | 10.0 MW | Operating | 1994 |
| TG5 | Natural Gas Steam Turbine | Natural Gas | 7.5 MW | Operating | 2001 |
| TG 1 | Natural Gas Steam Turbine | Natural Gas | 2.5 MW | Retired | 1948 |
| TG 2 | Natural Gas Steam Turbine | Natural Gas | 2.5 MW | Retired | 1948 |
| CO₂ | 23.1k metric tons |
|---|---|
| NOₓ | 38 metric tons |
| CO₂ Rate | 634 lb/MWh |
Annual totals and CO₂ rate reported by EPA eGRID for 2023. Reference averages are approximate U.S.-wide figures from the same dataset.
| NERC Region | NPCC |
|---|---|
| Balancing Authority | Iso New England Inc. |
Natural gas plants are the workhorse of the modern grid. Combined-cycle units achieve very high efficiency and can ramp up and down quickly to balance variable renewables. They emit roughly half the CO₂ per MWh of coal and far less of other pollutants, but they still release upstream methane during fuel extraction.