Air Quality in Hawaii

Hawaii has 4 counties with EPA air quality monitoring. Air quality is generally improving across the state, with an average of 292 "Good" days per county per year. The best air quality is in Kauai (median AQI 13) and the most polluted is Honolulu (median AQI 31).

County	Median AQI	Max AQI	Good Days	Unhealthy Days	Trend	Top Pollutant
Hawaii	21	75	355	0	↓ improving	PM2.5
Honolulu	31	85	360	0	→ stable	Ozone
Kauai	13	38	90	0	→ stable	PM2.5
Maui	21	101	363	1	↓ improving	PM2.5