SmogRank / Countries / United States / Hawaii
Most polluted cities in Hawaii, United States
4 measured cities ranked by PM2.5, last 7 days. Worst: Kahului at 6.4 µg/m³, #1408 in the world.
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data
Estimated: cities without a monitor
Hawaii cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| East Honolulu estimated | ≈ 6 µg/m³ |
| Pearl City estimated | ≈ 6 µg/m³ |
| Joint Base Pearl Harbor Hickam estimated | ≈ 6 µg/m³ |
| Aliamanu / Salt Lakes / Foster Village estimated | ≈ 6 µg/m³ |
| Kailua estimated | ≈ 7 µg/m³ |
| Waipahu estimated | ≈ 6 µg/m³ |
| ʻEwa Gentry-West Loch estimated | ≈ 6 µg/m³ |
| Kaneohe estimated | ≈ 6 µg/m³ |
| Makiki / Lower Punchbowl / Tantalus estimated | ≈ 6 µg/m³ |
| Mililani Town estimated | ≈ 6 µg/m³ |
| Manoa estimated | ≈ 6 µg/m³ |
| ‘Ewa Gentry estimated | ≈ 6 µg/m³ |
| Wahiawā-Whitmore estimated | ≈ 6 µg/m³ |
| ʻEwa Beach-Iroquois Point estimated | ≈ 6 µg/m³ |
| Mililani Mauka estimated | ≈ 6 µg/m³ |
| Makakilo-Makaīwa Hills-Kunia estimated | ≈ 6 µg/m³ |
| Kalihi Valley estimated | ≈ 6 µg/m³ |
| Schofield-Wheeler estimated | ≈ 6 µg/m³ |
| Waikīkī estimated | ≈ 6 µg/m³ |
| Diamond Head / Kapahulu / Saint Louis Heights estimated | ≈ 6 µg/m³ |
| Niu Valley estimated | ≈ 6 µg/m³ |
| Makakilo estimated | ≈ 6 µg/m³ |
| Mililani Mauka / Launani Valley estimated | ≈ 6 µg/m³ |
| Wahiawā estimated | ≈ 6 µg/m³ |
| ‘Ewa Beach estimated | ≈ 6 µg/m³ |
| Schofield Barracks estimated | ≈ 6 µg/m³ |
| Kuliouou - Kalani Iki estimated | ≈ 6 µg/m³ |
| Koolauloa estimated | ≈ 6 µg/m³ |
| Kapolei Villages estimated | ≈ 6 µg/m³ |
| Makakilo City estimated | ≈ 6 µg/m³ |
| Wailuku estimated | ≈ 6 µg/m³ |
| Kapolei estimated | ≈ 6 µg/m³ |
Updated 2026-10-01 10:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.