Massachusetts interconnection queue
26 interconnection applications are pending in Massachusetts, requesting 9.8 GW of new generating capacity across 12 counties, as of 15 August 2026. That places Massachusetts #40 of 47 states by capacity queued.
Pending applications
26
of 601 ever filed
Capacity queued
9.8 GW
requested, not committed
Already built
9.2 GW
108 connected
Built vs decided
18.8%
467 withdrawn
Counties in the queue
12
with five or more filings
Large load requested
none recorded
0 requests
Source: the interconnection queues of every transmission provider operating in Massachusetts. Parsed and normalised by Watt Street. Data as of 15 August 2026.
Which queues serve Massachusetts
| Queue or utility | Applications | Capacity pending |
|---|---|---|
| ISONE | 601 | 9.8 GW |
What is waiting in Massachusetts, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Battery | 18 | 4.6 GW |
| Wind | 5 | 4.0 GW |
| Nuclear | 3 | 1.2 GW |
Counties with the most capacity queued
| County | Pending | Capacity queued | Already built |
|---|---|---|---|
| Bristol County | 2 | 1.4 GW | 67 MW |
| Middlesex County | 5 | 1.3 GW | 404 MW |
| Suffolk County | 2 | 550 MW | 58 MW |
| Barnstable County | 1 | 500 MW | 338 MW |
| Norfolk County | 2 | 470 MW | 2.2 GW |
| Berkshire County | 2 | 426 MW | 939 MW |
| Essex County | 2 | 425 MW | 798 MW |
| Worcester County | 2 | 384 MW | 144 MW |
| Hampden County | 2 | 295 MW | 284 MW |
| Plymouth County | 1 | 20 MW | 173 MW |
| Franklin County | 1 | 7 MW | 1.3 GW |
| Hampshire County | 0 | 0 MW | 15 MW |
Massachusetts on the map
Every application above is plotted, searchable and clickable.