Data centers and new power in Massachusetts
9.7 GW of new power is waiting to connect to the grid in Massachusetts — 25 requests across 12 counties. That is the 40th largest amount of any state. 108 projects are built, 468 withdrawn. Data as of 14 October 2026.
What is happening with electricity in Massachusetts
Every new power plant, battery or big customer has to join a waiting list before it can plug into the grid. This is what that list looks like in Massachusetts right now.
Where every request ever filed here ended up
Most requests in the US are withdrawn — a developer tests a site and moves on. That is normal, not a warning sign for Massachusetts.
What kind of power is asking to connect
By capacity requested. Data as of 14 October 2026.
All the numbers
601 requests ever filed
Source: the interconnection queues of every transmission provider operating in Massachusetts. Parsed and normalised by Watt Street. Data as of 14 October 2026. A queued project is a request, not a commitment.
Waiting to connect, by type of power
| Type | Projects | Capacity requested |
|---|---|---|
| Batteries | 17 | 4.4 GW |
| Wind | 5 | 4.0 GW |
| Nuclear | 3 | 1.2 GW |
Who runs the waiting list in Massachusetts
| Grid operator or utility | Requests | Capacity pending |
|---|---|---|
| ISONE | 601 | 9.7 GW |
Counties in Massachusetts
12 with power on the waiting list
Every county with at least five requests on file. Open one to check an address, or see the schools near any mapped data center.
| County | Waiting | Capacity queued | Already built |
|---|---|---|---|
| Bristol County | 2 | 1.4 GW | 67 MW |
| Middlesex County | 4 | 1.2 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 |
Key dates for projects here
1 dated · next closes 2026-11-19 (ISONE)
| Queue | What closes | Closes | Standing |
|---|---|---|---|
| ISONE | ISO-NE cluster request window Cluster study under OATT Schedules 22, 23 and 25. | 2026-11-19 | disputed source |
| FERC | FERC large-load show cause — stakeholder comments on RTO responses Comments on the six RTO/ISO responses to the FPA section 206 show-cause orders of 18 June 2026 (PJM EL26-67, SPP EL26-68, NYISO EL26-69, MISO EL26-70… | No date published yet | unconfirmed source |
| FERC | FERC RM26-4 — generic large-load rulemaking Still at ANOPR stage. | No date published yet | confirmed source |
| FERC | Georgia PSC - Georgia Power must file large-load contracts 30 days before execution A standing obligation rather than a dated one: large-load contracts must be filed with the commission at least 30 days before they are executed. | No date published yet | confirmed source |
A date marked confirmed was checked by a person against the authority's own tariff, order or form page. Anything else is listed so you know it exists, with a link so you can check it yourself. Full calendar.
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