ISO-NE Datacenter Sites
ISO New England
At a glance
ISO New England coordinates the six-state Northeast. Winter peaking, constrained gas supply, and limited land keep it a niche datacenter market, but proximity to Boston drives latency-sensitive demand.
How does ISO-NE compare with other grid regions?
By site count ISO-NE is the 7th-largest of 9 regions GridCensus tracks, with 5,817 candidate sites. Its average DC Readiness of 54.7 is the 4th-highest of 9, above the 53.0 national average. The average interconnection-queue wait of 4.3 yrs is the 7th-shortest of 9. Sites here see an average queue depth of 11 projects at their nearest point of interconnection. Catalogued substation capacity near these sites sums to 146.0k MW, a theoretical aggregate rather than available headroom.
Which states and site types make up ISO-NE?
Massachusetts (1,859 sites, 32%), Maine (1,183 sites, 20%) and Connecticut (917 sites, 16%) hold the largest shares of the region's candidate sites. By type, industrial sites make up 58% (3,389; 24% nationally), substation-adjacent sites make up 15% (881; 26% nationally) and former mine sites make up 13% (728; 18% nationally).
Member states
- Massachusetts1,859
- Maine1,183
- Connecticut917
- Vermont742
- New Hampshire539
- Rhode Island445
- New York131
- Pennsylvania1
By site type
What are ISO-NE sites strongest and weakest on?
ISO-NE is strongest on water, averaging 90.6 against a national average of 72.3; its weakest factor is power availability, at 34.4 versus 37.4 nationally. Each factor is scored 0–100, where higher is better (for water and hazard, higher means lower stress and lower risk).
Top 25 datacenter sites in ISO-NE
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| K STREET | Substation-Adjacent | MA | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 72.4 |
| MYSTIC | Substation-Adjacent | MA | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 72.4 |
| BRIDGEPORT RESCO | Substation-Adjacent | CT | Greater Bridgeport Planning Region | 345 kV | 600 MW | 4.3 yrs | 71.7 |
| Manchester Landfill | Brownfield | NH | Hillsborough | — | 3 MW | 4.3 yrs | 70.2 |
| WEST RUTLAND | Substation-Adjacent | VT | Rutland County | 345 kV | 600 MW | 4.3 yrs | 68.9 |
| NEW HAVEN HARBOR | Substation-Adjacent | CT | South Central Connecticut Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.8 |
| Thornton Heights Common | Brownfield | ME | Cumberland | — | 0 MW | 4.3 yrs | 68.7 |
| UNKNOWN135915 | Substation-Adjacent | CT | Southeastern Connecticut Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.6 |
| UNKNOWN133485 | Substation-Adjacent | MA | Hampden County | 345 kV | 600 MW | 4.3 yrs | 68.5 |
| FROST BRIDGE | Substation-Adjacent | CT | Naugatuck Valley Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.5 |
| TAP136499 | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.4 |
| MONTVILLE | Substation-Adjacent | CT | Southeastern Connecticut Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.4 |
| UNKNOWN133682 | Substation-Adjacent | MA | Middlesex County | 450 kV | 600 MW | 4.3 yrs | 68.3 |
| MANCHESTER | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.3 |
| NO. WALL | Substation-Adjacent | CT | Lower Connecticut River Valley Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.2 |
| EAGLE | Substation-Adjacent | NH | Hillsborough County | 345 kV | 600 MW | 4.3 yrs | 68.2 |
| KINGSTON STREET | Substation-Adjacent | MA | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 68.2 |
| PLUMTREE | Substation-Adjacent | CT | Western Connecticut Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.2 |
| NORTH CAMBRIDGE | Substation-Adjacent | MA | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 68.1 |
| BARBOUR HILL | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 4.3 yrs | 67.9 |
| WAKEFIELD JUNCTION | Substation-Adjacent | MA | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 67.9 |
| NORTH BLOOMFIELD | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 4.3 yrs | 67.9 |
| UNKNOWN137065 | Substation-Adjacent | NH | Hillsborough County | 230 kV | 300 MW | 4.3 yrs | 67.8 |
| AMHERST | Substation-Adjacent | NH | Hillsborough County | 345 kV | 600 MW | 4.3 yrs | 67.8 |
| SOUTHINGTON | Substation-Adjacent | CT | Naugatuck Valley Planning Region | 345 kV | 600 MW | 4.3 yrs | 67.8 |
ISO-NE FAQ
What is ISO-NE?
ISO New England (ISO-NE) ISO New England coordinates the six-state Northeast. Winter peaking, constrained gas supply, and limited land keep it a niche datacenter market, but proximity to Boston drives latency-sensitive demand.
How many datacenter sites are in the ISO-NE region?
GridCensus catalogs 5,817 scored datacenter candidate sites in ISO-NE, averaging 54.7/100 DC Readiness — 4% of all sites scored nationally.
What is the average interconnection-queue wait in ISO-NE?
Candidate sites in ISO-NE average a 4.3 yrs queue wait with an average queue depth of 11 projects, the 7th-shortest of 9 regions.
Which state has the most ISO-NE datacenter sites?
Massachusetts has the most, with 1,859 scored sites (32% of the region), followed by Maine with 1,183.
What is the highest-scoring datacenter site in ISO-NE?
K STREET in Suffolk County, Massachusetts scores 72.4/100, the highest DC Readiness Score in the region.
Other grid regions
Related rankings and tools
Dataset updated . Screening estimates derived from public data sources.
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “ISO-NE datacenter candidate sites”, https://gridcensus.com/iso/iso-ne (data as of November 12, 2026).
Go deeper than the public screen
Every site and score for ISO-NE is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.