State file — HI
Underground storage tanks in Hawaii
2,563 registered facilities · 1,334 tanks in service · 1,393 leak records · 77 open cleanup cases (EPA UST Finder snapshot, 2018–2021 state data).
Hawaii runs 9.1 tanks in service per 10,000 residents (population 1,461,211). 1,316 of its 1,393 reported releases have reached No Further Action. The regulator of record is the Hawaii DOH UST Section, which holds the live registration and case files.
Check any Hawaii address
Free screening of every registered tank and reported leak within a mile of any address.
Screen an addressBy county
| County | Facilities | Tanks in service | Leak records | Open cases |
|---|---|---|---|---|
| Hawaii County | 431 | 280 | 202 | 5 |
| Honolulu County | 1,567 | 774 | 928 | 61 |
| Kalawao County | 2 | 3 | 0 | 0 |
| Kauai County | 199 | 102 | 90 | 6 |
| Maui County | 364 | 175 | 173 | 5 |
Frequently asked questions
How many underground storage tanks are in Hawaii?
The EPA UST Finder snapshot lists 2,563 registered UST facilities in Hawaii, with 1,334 tanks in service and 5,230 closed or removed tanks across 5 countys.
How many tank leaks have been reported in Hawaii?
1,393 releases are on record statewide. 1,316 (94%) were closed with No Further Action; 77 cleanup cases remained open in the snapshot.
Which Hawaii county has the most underground storage tanks?
By facility count: Honolulu (1,567), Hawaii (431), Maui (364), Kauai (199), Kalawao (2). Use the county pages for tank and leak detail, or screen any specific address free at https://tankcheckusa.site/.