Massachusetts Mun Wholes Electric Co operates 4 power plants across 1 country, with a combined installed capacity of 560 MW.
| Plant | Fuel | Country | MW | t CO₂/yr |
|---|---|---|---|---|
| Stony Brook | Oil | United States of America | 535 | — |
| Berkshire Wind Power Project | Wind | United States of America | 20 | — |
| Ashburnham Energy Storage Project | Storage | United States of America | 3 | — |
| Beebe Substation Battery Storage | Storage | United States of America | 3 | — |
Ownership & capacity: WRI Global Power Plant Database (CC BY 4.0). Measured CO₂ where reported to EPA/EU ETS/Climate TRACE.