AQI 28 · PM2.5 · Trend: Stable
| Average AQI | 28 |
| Good Days / Year | 320 |
| Unhealthy Days / Year | 2 |
| Primary Pollutant | PM2.5 |
| PM2.5 Average | 4.5 µg/m³ |
| Trend | → Stable |
| Monitoring Stations | 12 |
| Nonattainment Areas | 0 |
Hawaii has the best air quality of any US state, thanks to constant trade winds over the Pacific Ocean. The only significant natural air quality threat is volcanic fog (vog) from Kilauea, which primarily affects the Big Island's Kona coast.
Hawaii DOH Clean Air Branch manages air quality. Special monitoring for volcanic fog (vog). Aggressive renewable energy targets reduce power plant emissions.
No nonattainment areas. Hawaii consistently has some of the cleanest air in the United States.