Air Quality
Current AQI readings across Hawaii
What is AQI?
The Air Quality Index is a 0–500 scale measuring air pollution levels. It tracks ozone, particle pollution (PM2.5/PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide.
Air Quality in Hawaii
The most common concern is vog — volcanic smog from Kīlauea containing PM2.5 and sulfur dioxide. Trade wind disruptions can trap pollutants near the surface.
0–50
Good
51–100
Moderate
101–150
USG
151–200
Unhealthy
201–300
Very Unhealthy
301+
Hazardous
Honolulu
Oahu
Kailua
Oahu
Kapolei
Oahu
Kahului
Maui
Hilo
Big Island
Lihue
Kauai
Data from EPA AirNow. Updated hourly.