Suffolk County, MA interconnection queue
2 interconnection applications are pending in Suffolk County, MA, requesting 550 MW of new generating capacity, as of 15 August 2026. 8 projects have been built here and 13 have been withdrawn since 1998.
Source: interconnection queues published by ISONE. Parsed and normalised by Watt Street. Data as of 15 August 2026. A queued project is a request, not a commitment.
What is waiting in Suffolk County, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Battery | 2 | 550 MW |
Outcomes of every application filed here
| Outcome | Projects | Capacity | Share |
|---|---|---|---|
| Built | 8 | 58 MW | 34.8% |
| Still pending | 2 | 550 MW | 8.7% |
| Withdrawn | 13 | 4.8 GW | 56.5% |
| Suspended | 0 | — | 0.0% |
Withdrawal is the ordinary outcome of an interconnection application nationally, not a sign of a problem in this county. Most withdrawals are a developer testing a site and moving on.
The largest projects on file
| Project | Fuel | Capacity | Status | Filed | Queue |
|---|---|---|---|---|---|
| Internal HVDC - North to South flow | Nuclear | 1.0 GW | withdrawn | 2015-02 | ISONE |
| HVDC from S. Maine to K Street - bidirectional fl | Nuclear | 1.0 GW | withdrawn | 2015-02 | ISONE |
| Combined Cycle | Gas | 800 MW | withdrawn | 2020-04 | ISONE |
| Combined Cycle | Gas | 800 MW | withdrawn | 2020-04 | ISONE |
| Battery Storage | Battery | 700 MW | withdrawn | 2020-08 | ISONE |
| Lite Brite Battery Storage | Battery | 300 MW | active | 2021-07 | ISONE |
| Battery Storage | Battery | 276 MW | withdrawn | 2021-08 | ISONE |
| Hecate Energy Eastern Ave Energy Center | Battery | 250 MW | active | 2021-04 | ISONE |
| Gas Turbine | Hybrid | 168 MW | withdrawn | 2006-02 | ISONE |
| MATEP (Medical Area Total Energy Project) | Gas | 42 MW | completed | 2006-05 | ISONE |
| Gas Turbine (Additional Capacity) | Hybrid | 29 MW | withdrawn | 2006-05 | ISONE |
| MATEP -3rd CTG | Gas | 14 MW | completed | 2013-01 | ISONE |
| MATEP - Third CTG | Gas | 12 MW | withdrawn | 2008-06 | ISONE |
| MATEP (Combined Cycle) Increase | Gas | 2 MW | completed | 2014-01 | ISONE |
| Sithe Mystic Station Expansion Unit 8 | Gas | — | completed | 1998-03 | ISONE |
How this county ranks
Suffolk County ranks #584 of 1,607 US counties by capacity currently queued, and #3 of 12 in Massachusetts.
Other Massachusetts counties in the queue
| County | Pending | Capacity queued |
|---|---|---|
| Bristol County | 2 | 1.4 GW |
| Middlesex County | 5 | 1.3 GW |
| Barnstable County | 1 | 500 MW |
| Norfolk County | 2 | 470 MW |
| Berkshire County | 2 | 426 MW |
| Essex County | 2 | 425 MW |
| Worcester County | 2 | 384 MW |
| Hampden County | 2 | 295 MW |
Go deeper on Suffolk County
The interactive map plots every one of these applications, and a generated county report puts them in a sourced PDF with the date each figure was true on every page.
Open Suffolk County on the map County reports All of Massachusetts