Hawaii, HI
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Hawaii in Hawaii · Population: 203,684
TRI sites such as Hill Generating Station; U.S. Army Pohakuloa Training Area - Range Facility; Hawaii Electric Light Co Inc Puna Generating Station; SDWIS systems such as HILO; NORTH KONA; WAIKOLOA anchor Hawaii, HI's EPA extract. Derived burden score 44/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Hawaii include HILO; PAHALA; KUKUIHAELE, while Hill Generating Station leads reported TRI pounds among local Form R filers. AQS median AQI 21 / peak 75 in 2024.
Burden score 44/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Hawaii -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Hawaii, HI: EPA TRI 2023 reporting year
Same facilities, both years
-15.5%
7 facilities that filed in 2022 and 2023
Whole inventory
-15.5%
215.2 thousand lb → 181.9 thousand lb, every facility that filed
- Hawaii, HI's total reported releases fell from 215.2 thousand lb in 2022 to 181.9 thousand lb in 2023, based on EPA TRI filings.
- Hawaii, HI's off-site transfers rose from 87 lb in 2022 to 114 lb in 2023, based on EPA TRI filings.
- Hawaii, HI's air releases fell from 178.9 thousand lb in 2022 to 145.7 thousand lb in 2023, based on EPA TRI filings.
- Hawaii, HI's chemicals reported rose from 16 in 2022 to 17 in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 355 (97%) | 11 | 0 | 75 |
| 2023 | 336 (92%) | 29 | 0 | 71 |
| 2022 | 328 (90%) | 37 | 0 | 71 |
| 2021 | 336 (92%) | 29 | 0 | 65 |
| 2020 | 352 (96%) | 14 | 0 | 83 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Hawaii, see the EPA's AirNow.gov.
Water Systems (36)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| HILO | 39,477 | 1 |
| NORTH KONA | 29,581 | 0 |
| WAIKOLOA | 12,100 | 0 |
| SOUTH KOHALA | 9,612 | 0 |
| KAANAPALI | 8,000 | 0 |
| SOUTH KONA | 6,512 | 0 |
| OLAA-MOUNTAIN VIEW | 6,467 | 0 |
| BARBERS POINT | 5,256 | 0 |
| NORTH KOHALA | 4,933 | 0 |
| HAINA | 4,563 | 0 |
| HAWAIIAN BEACHES | 3,546 | 0 |
| WAIOHINU-NAALEHU | 2,948 | 0 |
| PAPAIKOU | 2,203 | 0 |
| LALAMILO | 1,895 | 0 |
| PAHOA | 1,885 | 0 |
| PEPEEKEO | 1,450 | 0 |
| HAWAIIAN SHORES | 1,360 | 0 |
| PAHALA | 1,226 | 1 |
| LAUPAHOEHOE-KAPEHU | 1,169 | 0 |
| HAWAIIAN OCEAN VIEW ESTATES | 1,000 | 0 |
| KOHALA RANCH WATER CO. | 850 | 0 |
| PAAUILO | 716 | 0 |
| HONOMU | 645 | 0 |
| KUKUIHAELE | 483 | 1 |
| NAPUU WATER INC. | 468 | 0 |
| HAKALAU-WAILEA | 402 | 0 |
| KALAPANA | 275 | 0 |
| OOKALA (DWS) | 264 | 0 |
| KONA WATER SERVICE COMPANY | 260 | 0 |
| NIULII | 254 | 0 |
| KEOPU WATER ASSOCIATION | 250 | 2 |
| KAWAIHAE UNIT #1 | 193 | 0 |
| NINOLE | 151 | 0 |
| WAIKI'I RANCH | 102 | 0 |
| WOOD VALLEY | 75 | 0 |
| PEPEEKEO WATER ASSOCIATION | 60 | 1 |
TRI Facilities (7)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Hill Generating Station | 760.3K lbs |
| 2 | U.S. Army Pohakuloa Training Area - Range Facility | 242.3K lbs |
| 3 | Hawaii Electric Light Co Inc Puna Generating Station | 112.2K lbs |
| 4 | Hawaii Electric Light Co Inc Keahole Generating Station | 61.2K lbs |
| 5 | Hamakua Energy Plant | 24.8K lbs |
| 6 | Pacific Biodiesel LLC | 16.5K lbs |
| 7 | Aloha Petroleum Llc-Hilo West Terminal | 4.7K lbs |
Cities in Hawaii (9)
Frequently Asked Questions
What is the environmental risk level in Hawaii, Hawaii? ▼
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What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.