Substation-Adjacent Datacenter Sites in Hawaii
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 Hawaii
| Site | Type | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|
| CEIP | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 62.8 |
| KEWALO | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 62.7 |
| AES | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 62.5 |
| MAKALAPA | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 62.5 |
| KAHE 1 | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 62.2 |
| WAHIAWA | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 61.9 |
| EWA NUI | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 61.4 |
| UNKNOWN173461 | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 61.4 |
| HAIAWA | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 61.4 |
| TAP173459 | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 61.3 |
| WAIAU 1 | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 61.1 |
| PUKELE | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 60.8 |
| KOOLAU | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 60.7 |
| RISER155668 | Substation-Adjacent | Honolulu County | 138 kV | 100 MW | 4.3 yrs | 60.7 |
| UNKNOWN155661 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 53.2 |
| UNKNOWN155666 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 53.0 |
| UNKNOWN155662 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 52.9 |
| TAP155660 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 52.8 |
| UNKNOWN155663 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 52.7 |
| UNKNOWN155669 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 52.7 |
| UNKNOWN155664 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 52.5 |
| UNKNOWN157720 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 52.2 |
| UNKNOWN157721 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 50.2 |
| UNKNOWN156804 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 50.2 |
| UNKNOWN157719 | Substation-Adjacent | Maui County | 69 kV | 50 MW | 4.3 yrs | 50.2 |
How does Hawaii compare with other states for substation-adjacent sites?
With 57 sites, Hawaii ranks 51st 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, Hawaii averages 50.0, the 48th-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 Hawaii?
The top 25 range from 62.8 to 50.2 on the 0–100 DC Readiness Score. They are concentrated in Honolulu County (14) and Maui County (11).
County pages: Honolulu County · Maui County
What power, fiber and flood exposure do these substation-adjacent sites have?
Of the top 25 substation-adjacent sites in Hawaii, 25 have a recorded nearest-substation voltage, with a median of 138 kV; for 0 that substation is rated 230 kV or higher. Their counties have a median of 7 fixed fiber broadband providers in FCC data. The median distance to the nearest internet exchange facility is 10 km. The median interconnection-queue wait in their markets is 4.3 years. None of the 1 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 Hawaii?
GridCensus catalogs 57 substation-adjacent datacenter candidate sites in Hawaii, 0.1% of the national total for this type (51st 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 Hawaii?
By DC Readiness Score, CEIP in Honolulu County ranks first at 62.8/100, followed by KEWALO in Honolulu County at 62.7.
Which Hawaii counties have the best substation-adjacent sites?
The top 25 substation-adjacent sites in Hawaii are concentrated in Honolulu County (14) and Maui County (11).
How does Hawaii score for datacenters overall?
All 252 scored sites in Hawaii average 50.0/100 DC Readiness, the 48th-highest of 52 states, against a national average of 53.0.
More on substation-adjacent sites and Hawaii
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 Hawaii”, https://gridcensus.com/site-types/substation/hawaii (data as of November 12, 2026).
Go deeper than the public screen
Every site and score for Substation-Adjacent sites in Hawaii 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.