Air Quality in Alaska

Alaska has 10 counties with EPA air quality monitoring. Air quality is generally improving across the state, with an average of 210 "Good" days per county per year. The best air quality is in North Slope (median AQI 5) and the most polluted is Fairbanks North Star (median AQI 42).

County	Median AQI	Max AQI	Good Days	Unhealthy Days	Trend	Top Pollutant
Aleutians East	13	53	111	0	→ stable	PM2.5
Anchorage	24	90	297	0	↓ improving	PM2.5
Bethel	7	56	165	0	↓ improving	PM10
Denali	35	77	357	0	→ stable	Ozone
Fairbanks North Star	42	325	213	25	↓ improving	PM2.5
Juneau	24	84	304	0	↓ improving	PM2.5
Kenai Peninsula	8	42	122	0	→ stable	PM2.5
Matanuska-Susitna	15	95	331	0	↓ improving	PM2.5
North Slope	5	32	120	0	→ stable	PM2.5
Yukon-Koyukuk	6	96	80	0	↓ improving	PM2.5