Brownfield & Retired Power Plant Sites in Hawaii
16 catalogued brownfield and retired-generation sites in Hawaii, listed by former capacity. Each carries an existing utility-scale grid interconnection that a new datacenter load may be able to re-use.
At a glance
What kinds of former sites are in Hawaii?
By former use, the list includes 10 oil, 2 hydroelectric, 2 RCRA hazardous-waste, 1 Superfund, 1 biomass. Recorded retirement dates run from January 2001 to February 2019, with 3 retirements in 2015 or later. 11 of 13 sites with a measured distance sit within 2 miles of a transmission substation.
How does Hawaii compare with other states?
Hawaii ranks 38th of 50 states and DC by number of brownfield and retired-generation sites, out of 2,085 nationally. By recorded capacity (222 MW) it ranks 47th, against 289,280 MW across all states. The state also has 252 scored datacenter candidate sites, 6 of them classed as brownfield sites, averaging 50 on the 0–100 DC Readiness scale.
Where in Hawaii are these sites?
- Honolulu County · 6
- Hawaii County · 4
- Kauai County · 3
All brownfield and retired plant sites in Hawaii
| Site | Former use | Capacity | Retired | County |
|---|---|---|---|---|
| Honolulu | oil | 104 MW | 2014-01-01 | Honolulu |
| Joint Base Pearl Harbor-Hickam West Loch Annex | superfund | 42 MW | — | — |
| Shipman | oil | 19 MW | 2015-12-01 | Hawaii |
| Port Allen (HI) | oil | 10 MW | 2019-02-01 | Kauai |
| Ewa Nui Substation DG | oil | 10 MW | 2010-04-01 | Honolulu |
| Keahole | oil | 8 MW | 2004-05-01 | Hawaii |
| CEIP Substation Distributed Generation | oil | 5 MW | 2010-04-01 | Honolulu |
| Kalaeoloa Pole Yard DG | oil | 5 MW | 2010-04-01 | Honolulu |
| Helemano Substation DG | oil | 5 MW | 2010-04-01 | Honolulu |
| Iwilei Tank Farm DG | oil | 5 MW | 2010-04-01 | Honolulu |
| Gay Robinson | biomass | 4 MW | 2009-11-01 | Kauai |
| Waimea | oil | 3 MW | 2001-01-01 | Hawaii |
| Puueo | hydro | 2 MW | 2002-12-01 | Hawaii |
| Kapolei Sustainable Energy Park | rcra | 1 MW | — | — |
| Kalaheo Hydro | hydro | 1 MW | 2016-09-01 | Kauai |
| Goodfellow Bros. Solar Rooftop | rcra | 0 MW | — | — |
Frequently asked questions
How many retired power plants are in Hawaii?
GridCensus lists 13 retired power plant sites in Hawaii from EIA-860 retirement records. 13 have a recorded retirement date, 3 of them in 2015 or later.
What is the largest retired power plant or brownfield site in Hawaii?
Honolulu in Honolulu is the largest by recorded capacity, at 104.4 MW. It is followed by Joint Base Pearl Harbor-Hickam West Loch Annex (42 MW) and Shipman (18.5 MW).
Which power plant in Hawaii retired most recently?
Port Allen (HI) has the latest recorded retirement date in the state, February 2019, with 10 MW of capacity.
Which county in Hawaii has the most brownfield and retired plant sites?
Honolulu County has the most, with 6, followed by Hawaii County with 4.
How many EPA brownfield sites in Hawaii have completed cleanup?
3 of the 3 EPA-tracked sites listed for Hawaii are recorded as cleanup complete.
Looking for a specific record? The directory lists every brownfield site, A to Z.
More on Hawaii, and states with similar counts
About this data
Source: EIA-860 retired generating units and EPA RE-Powering America's Land contaminated-site records, as published March 6, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Brownfield and retired power plant sites in Hawaii”, https://gridcensus.com/brownfield-sites/hawaii (data as of March 6, 2026).
Dataset updated . Screening estimates derived from public data sources.
Go deeper than the public screen
Every site and score for brownfield 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.