Honolulu County contains 291 EPA-regulated facilities, 10 of which are currently flagged for significant noncompliance. The county also hosts 3 Superfund sites and 20 TRI chemical reporters. EPA has assessed $51.2M in lifetime penalties and TRI reporters disclosed roughly 1.7M lb of on-site releases. That facility count is well above the Hawaii state average of 83 per county.
| Site | City | Status |
|---|---|---|
| Naval Computer And Telecommunications Area Master Station Eastern Pacific | Wahiawa | Cleanup underway |
| Pearl Harbor Naval Complex | Pearl Harbor | Cleanup underway |
| Del Monte Corp Oahu Plantation | Kunia | Ready for anticipated reuse |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Par East Refinery | Kapolei | $31.3M | 2025-09-30 |
| Ies Downstream, Llc - Kapolei Refinery Mm | Kapolei | $890.8k | 2026-01-30 |
| Unitek Solvent Environmental Services Inc | Kapolei | $165.0k | 2022-05-10 |
| Coralco - Island Demo_(Laimu) | Honolulu | $0 | |
| Precision Demolition | Waipahu | $0 | |
| C & C Kapaa/Kalaheo Landfill | Kailua | $0 | 2005-11-14 |
| (Former) Hawaiian Western Steel Wastepile | Kapolei | $0 | 1992-07-29 |
| Vip Towing | Honolulu | $0 | 2021-01-14 |
| County Of Honolulu - Wm - Waimanalo Gulch Landfill | Kapolei | $0 | 2025-08-07 |
| Kailua 7th-Day Adventist Church | Honolulu | $0 |