13th largest plant in Massachusetts · 1175th nationally
Exelon West Medway Ii Llc is a natural gas power plant in Massachusetts with a nameplate capacity of 264 MW. It generates roughly 164.2k MWh per year — enough to power about 15,641 average U.S. homes.
Its capacity factor of 7% reflects intermittent or peaking operation. At 1177 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
| Plant Name | Exelon West Medway Ii Llc |
|---|---|
| Operator | Constellation Power, Inc |
| City | Medway |
| County | Norfolk County |
| State | Massachusetts |
| ZIP | 02053 |
| Coordinates | 42.13722, -71.44470 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 4 | Natural Gas Fired Combustion Turbine | Natural Gas | 132 MW | Operating | 2019 |
| 5 | Natural Gas Fired Combustion Turbine | Natural Gas | 132 MW | Operating | 2019 |
| CO₂ | 96.7k metric tons |
|---|---|
| NOₓ | 8 metric tons |
| CO₂ Rate | 1177 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.