Air Quality Rankings for Alaska 2026
Alaska has 8 cities with EPA air quality data. North Slope, Alaska has the cleanest air with a 5-year average AQI of 6. Fairbanks North Star, Alaska has the highest AQI at 42.
| # | City | 5yr Avg AQI | Current AQI | Worst Pollutant | Trend | Grade |
|---|---|---|---|---|---|---|
| 1 | North Slope, Alaska | 6 | 4 | PM2.5 | Improving | A |
| 2 | Kenai Peninsula, Alaska | 10 | 10 | PM2.5 | Stable | B |
| 3 | Aleutians East, Alaska | 12 | 11 | PM2.5 | Stable | B |
| 4 | Matanuska-Susitna, Alaska | 17 | 14 | PM2.5 | Improving | A |
| 5 | Juneau, Alaska | 22 | 24 | PM2.5 | Improving | A |
| 6 | Anchorage, Alaska | 26 | 21 | PM2.5 | Improving | A |
| 7 | Denali, Alaska | 34 | 33 | Ozone | Stable | B |
| 8 | Fairbanks North Star, Alaska | 42 | 41 | PM2.5 | Improving | C |
Air quality data for Alaska is sourced from the EPA Air Quality System (AQS), which monitors outdoor air quality at thousands of stations nationwide.
Frequently Asked Questions
North Slope, Alaska has the best air quality in Alaska with a 5-year average AQI of 6 and a grade of A.
Alaska has 8 cities with EPA air quality monitoring data in our database, covering multiple years of AQI measurements.
The Air Quality Index (AQI) measures five major pollutants: ground-level ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. Lower AQI values indicate cleaner air — 0-50 is "Good," while 150+ is "Unhealthy."
Cities ranked by 5-year average AQI (lower is better). Grades factor in average AQI, trend direction, unhealthy days, and dominant pollutant.