Datacenter Sites in Northeastern Connecticut County, Connecticut
Northeastern Connecticut County has 32 scored datacenter candidate sites averaging 55.0/100 DC Readiness, with a catalogued aggregate of 1,650 MW. FEMA rates local natural-hazard risk as "Relatively Low". The county has a datacenter tax incentive on record.
At a glance
Northeastern Connecticut County, Connecticut has 32 scored datacenter candidate sites averaging 55.0/100 DC Readiness, roughly in line with the Connecticut average of 56.7. It ranks 9th of 13 Connecticut counties by number of sites and 8th by average score. The top-scoring site is KILLINGLY at 65.8/100.
Site-selection context for Northeastern Connecticut County
Incentive detail: Sales tax exemption on computer & data processing equipment.
How does Northeastern Connecticut County compare with other counties in Connecticut?
By number of scored sites, Northeastern Connecticut County ranks 9th of the 13 Connecticut counties with a county page, holding 3.5% of the state's 919 sites. Its average DC Readiness of 55.0/100 ranks 8th in the state and is roughly in line with the national average of 53.0. Nationally it has the 1196th-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 7 score 55 or higher.
What types of datacenter sites are in Northeastern Connecticut County?
Former Mine sites are the most common (14, 44% of the county's inventory), followed by industrial (10) and substation-adjacent (6). Site type reflects how the parcel was identified — next to a substation, on a former mine or brownfield, on industrial or federal excess land — and is scored on the same 14 factors either way.
What are power cost, hazard, water and fiber conditions in Northeastern Connecticut County?
FEMA's National Risk Index rates the county "Relatively Low" (20). WRI water stress is low. 10 fiber providers report service in the county. The climate runs 700 cooling degree days a year with a mean temperature of 50°F. Land is valued around $14,669 an acre.
By site type
Top datacenter sites in Northeastern Connecticut County
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| KILLINGLY | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 65.8 |
| MANSFIELD | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 59.8 |
| Greenfield (LAKE ROAD - CARD`) | Greenfield | 345 kV | 600 MW | 4.3 yrs | 59.7 |
| FRY BROOK | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 59.6 |
| TAP136579 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 59.4 |
| TAP136582 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 59.4 |
| EAST WEBSTER | Substation-Adjacent | 69 kV | 50 MW | 4.3 yrs | 58.9 |
| PUTNAM | Federal Excess | — | — | 4.3 yrs | 54.0 |
| Mine Site | Former Mine | — | — | 4.3 yrs | 53.7 |
| Mine Site | Former Mine | — | — | 4.3 yrs | 53.7 |
| Mine Site | Former Mine | — | — | 4.3 yrs | 53.7 |
| Mine Site | Former Mine | — | — | 4.3 yrs | 53.7 |
| Powdrell & Alexander Textile Mill | Industrial | — | — | 4.3 yrs | 53.7 |
| Mine Site | Former Mine | — | — | 4.3 yrs | 53.6 |
| Inter Royal | Industrial | — | — | 4.3 yrs | 53.6 |
| 206 Maple Street (Former Maple Street Fire Station) | Industrial | — | — | 4.3 yrs | 53.5 |
| 179 Main Street (American Electric Cable Block Area) | Industrial | — | — | 4.3 yrs | 53.5 |
| Parsons Paper | Industrial | — | — | 4.3 yrs | 53.5 |
| Mine Site | Former Mine | — | — | 4.3 yrs | 53.5 |
| Mine Site | Former Mine | — | — | 4.3 yrs | 53.5 |
| 170 Sargeant Street (Sargeant/Beech Streets Block) | Industrial | — | — | 4.3 yrs | 53.5 |
| 195 Appleton Street (Adams Pakkawood/Xidex Area) | Industrial | — | — | 4.3 yrs | 53.5 |
| Mine Site | Former Mine | — | — | 4.3 yrs | 53.5 |
| 325 Pine Street Sargeant/Beech Streets Block #6 | Industrial | — | — | 4.3 yrs | 53.5 |
| Mine Site | Former Mine | — | — | 4.3 yrs | 53.5 |
Every scored site in Northeastern Connecticut County
All 32 sites, best first.
- KILLINGLY · 65.8
- MANSFIELD · 59.8
- Greenfield (LAKE ROAD - CARD`) · 59.7
- FRY BROOK · 59.6
- Substation-Adjacent site · 17ca5f3c · 59.4
- Substation-Adjacent site · 6db71021 · 59.4
- EAST WEBSTER · 58.9
- PUTNAM · 066fb447 · 54.0
- Mine Site · e0cee833 · 53.7
- Mine Site · 4cfcc52f · 53.7
- Mine Site · 7a9b244e · 53.7
- Mine Site · 3d3f0256 · 53.7
- Powdrell & Alexander Textile Mill · 53.7
- Mine Site · a1dc73bb · 53.6
- Inter Royal · 53.6
- 206 Maple Street (Former Maple Street Fire Station) · 53.5
- 179 Main Street (American Electric Cable Block Area) · 53.5
- Parsons Paper · 53.5
- Mine Site · 9435ccb9 · 53.5
- Mine Site · 85077c9c · 53.5
- 170 Sargeant Street (Sargeant/Beech Streets Block) · 53.5
- 195 Appleton Street (Adams Pakkawood/Xidex Area) · 53.5
- Mine Site · 93df53c4 · 53.5
- 325 Pine Street Sargeant/Beech Streets Block #6 · 53.5
- Mine Site · a218d6d0 · 53.5
- 167 Appleton Street (American Electric Cable Block Area) · 53.5
- 169 Main Street (American Electric Cable Block Area) · 53.5
- Mine Site · c7366edc · 53.4
- Mine Site · 1487487a · 53.4
- Mine Site · de5484ba · 53.4
- Mine Site · 46bc15a1 · 53.2
- Mine Site · da4cca69 · 53.0
Northeastern Connecticut County datacenter FAQ
How many datacenter sites are in Northeastern Connecticut County?
32 scored datacenter candidate sites, averaging 55.0/100 DC Readiness. That is the 9th-most of 13 Connecticut counties with five or more sites.
What is the highest-scoring datacenter site in Northeastern Connecticut County?
KILLINGLY scores 65.8/100 DC Readiness, the highest of the 32 scored sites in Northeastern Connecticut County (a substation-adjacent site).
Does Northeastern Connecticut County offer datacenter tax incentives?
Sales tax exemption on computer & data processing equipment.
What is the natural-hazard risk in Northeastern Connecticut County?
FEMA's National Risk Index rates Northeastern Connecticut County as "Relatively Low" (score 20).
More in Connecticut
- All datacenter sites in Connecticut· 919 sites
- Operating datacenters in Connecticut
- Electric substations in Connecticut
- Capitol County· 180 sites · avg 57.6
- Naugatuck Valley Planning Region· 159 sites · avg 57.5
- Southeastern Connecticut County· 103 sites · avg 56.8
- South Central Connecticut County· 100 sites · avg 57.2
- Western Connecticut County· 98 sites · avg 57.7
- Greater Bridgeport County· 81 sites · avg 58.2
- Former Mine sites in Connecticut
- Industrial sites in Connecticut
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, “Datacenter candidate sites in Northeastern Connecticut County, Connecticut”, https://gridcensus.com/datacenter-sites/connecticut/northeastern-connecticut-county (data as of November 12, 2026).
Dataset updated . Screening estimates derived from public data sources.
Go deeper than the public screen
Every site and score for Northeastern Connecticut County, Connecticut 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.