Substation-Adjacent Datacenter Sites in Massachusetts
At a glance
Parcels sited next to existing transmission substations. Co-location with a substation is the single strongest speed-to-power signal — interconnection distance is measured in feet, not miles.
Top substation-adjacent sites in Massachusetts
| Site | Type | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|
| MYSTIC | Substation-Adjacent | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 72.4 |
| K STREET | Substation-Adjacent | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 72.4 |
| UNKNOWN133485 | Substation-Adjacent | Hampden County | 345 kV | 600 MW | 4.3 yrs | 68.5 |
| UNKNOWN133682 | Substation-Adjacent | Middlesex County | 450 kV | 600 MW | 4.3 yrs | 68.3 |
| KINGSTON STREET | Substation-Adjacent | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 68.2 |
| NORTH CAMBRIDGE | Substation-Adjacent | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 68.1 |
| WAKEFIELD JUNCTION | Substation-Adjacent | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 67.9 |
| TEWKSBURY NO. 22A | Substation-Adjacent | Middlesex County | 345 kV | 600 MW | 4.3 yrs | 67.2 |
| GOLDEN HILLS | Substation-Adjacent | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 67.0 |
| LEXINGTON | Substation-Adjacent | Middlesex County | 345 kV | 600 MW | 4.3 yrs | 67.0 |
| HYDE PARK | Substation-Adjacent | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 66.9 |
| WOBURN | Substation-Adjacent | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 66.9 |
| HOLBROOK | Substation-Adjacent | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 66.7 |
| WEST AMESBURY | Substation-Adjacent | Rockingham County | 345 kV | 600 MW | 4.3 yrs | 66.5 |
| AUBURN STREET | Substation-Adjacent | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 66.5 |
| WALTHAM | Substation-Adjacent | Middlesex County | 230 kV | 300 MW | 4.3 yrs | 66.3 |
| STOUGHTON | Substation-Adjacent | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 66.2 |
| AGAWAM | Substation-Adjacent | Hampden County | 345 kV | 600 MW | 4.3 yrs | 66.2 |
| WEST WALPOLE | Substation-Adjacent | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 66.1 |
| WARD HILL | Substation-Adjacent | Essex County | 345 kV | 600 MW | 4.3 yrs | 65.9 |
| UNKNOWN132928 | Substation-Adjacent | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 65.7 |
| WEST MEDWAY | Substation-Adjacent | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 65.7 |
| BERRY STREET | Substation-Adjacent | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 65.6 |
| BRIDGEWATER | Substation-Adjacent | Plymouth County | 345 kV | 600 MW | 4.3 yrs | 65.6 |
| UNKNOWN133410 | Substation-Adjacent | Providence County | 345 kV | 600 MW | 4.3 yrs | 65.5 |
How does Massachusetts compare with other states for substation-adjacent sites?
With 305 sites, Massachusetts ranks 40th of the 52 states that have any substation-adjacent candidate sites. Texas leads with 3,635. Nationally, substation-adjacent sites average 57.4/100 DC Readiness, above the 53.0 average across all site types. Across every site type, Massachusetts averages 54.2, the 23rd-highest of 52 states, and its candidate sites face an average interconnection-queue wait of 4.3 years.
Where are the highest-scoring substation-adjacent sites in Massachusetts?
The top 25 range from 72.4 to 65.5 on the 0–100 DC Readiness Score. They are concentrated in Suffolk County (8), Norfolk County (7), Middlesex County (4) and Hampden County (2). By grid region, 25 are in ISO-NE.
County pages: Suffolk County · Norfolk County · Middlesex County · Hampden County
What power, fiber and flood exposure do these substation-adjacent sites have?
Of the top 25 substation-adjacent sites in Massachusetts, 25 have a recorded nearest-substation voltage, with a median of 345 kV; for 25 that substation is rated 230 kV or higher. Their counties have a median of 11 fixed fiber broadband providers in FCC data. The median distance to the nearest internet exchange facility is 9 km. The median interconnection-queue wait in their markets is 4.3 years. None of the 7 with a mapped FEMA flood zone sits in a high-risk (A or V) zone.
Frequently asked questions
How many substation-adjacent datacenter sites are in Massachusetts?
GridCensus catalogs 305 substation-adjacent datacenter candidate sites in Massachusetts, 0.8% of the national total for this type (40th of 52 states).
What is a substation-adjacent datacenter site?
Parcels sited next to existing transmission substations. Co-location with a substation is the single strongest speed-to-power signal — interconnection distance is measured in feet, not miles.
What is the best substation-adjacent datacenter site in Massachusetts?
By DC Readiness Score, MYSTIC in Suffolk County ranks first at 72.4/100, followed by K STREET in Suffolk County at 72.4.
Which Massachusetts counties have the best substation-adjacent sites?
The top 25 substation-adjacent sites in Massachusetts are concentrated in Suffolk County (8), Norfolk County (7), Middlesex County (4) and Hampden County (2).
How does Massachusetts score for datacenters overall?
All 1,861 scored sites in Massachusetts average 54.2/100 DC Readiness, the 23rd-highest of 52 states, against a national average of 53.0.
More on substation-adjacent sites and Massachusetts
- All datacenter sites in Massachusetts· 1,861 sites
- Substation-Adjacent datacenter sites nationwide· 38,820 sites
- Industrial sites in Massachusetts· 1,101 sites
- Greenfield sites in Massachusetts· 242 sites
- Former Mine sites in Massachusetts· 141 sites
- Brownfield sites in Massachusetts· 44 sites
- Federal Excess sites in Massachusetts· 26 sites
Substation-Adjacent sites in other states
- Substation-Adjacent sites in Texas· 3,635 sites
- Substation-Adjacent sites in California· 1,573 sites
- Substation-Adjacent sites in Florida· 1,539 sites
- Substation-Adjacent sites in Georgia· 1,530 sites
- Substation-Adjacent sites in Oklahoma· 1,344 sites
- Substation-Adjacent sites in Washington· 1,343 sites
- Substation-Adjacent sites in Minnesota· 1,270 sites
- Substation-Adjacent sites in Kentucky· 1,261 sites
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, “Substation-Adjacent datacenter sites in Massachusetts”, https://gridcensus.com/site-types/substation/massachusetts (data as of November 12, 2026).
Go deeper than the public screen
Every site and score for Substation-Adjacent sites in Massachusetts 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.