Juneau, Alaska Air Quality
Juneau County, Alaska (AK)
↓ Improvingover 10 years
10-Year AQI Trend
The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days). This area has seen measurable air quality improvement over the decade.
Air Quality Day Breakdown
Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).
Year-by-Year Data
| Year | Median AQI | 90th Pct | Max AQI | Good Days | Moderate | Unhealthy+ | Pollutant |
|---|---|---|---|---|---|---|---|
| 2023 | 24 | 54 | 78 | 314 | 50 | 0 | PM2.5 |
| 2022 | 21 | 56 | 95 | 291 | 51 | 0 | PM2.5 |
| 2021 | 20 | 53 | 89 | 315 | 42 | 0 | PM2.5 |
| 2020 | 19 | 52 | 101 | 320 | 40 | 1 | PM2.5 |
| 2019 | 27 | 60 | 145 | 280 | 79 | 3 | PM2.5 |
| 2018 | 31 | 59 | 85 | 268 | 84 | 0 | PM2.5 |
| 2017 | 20 | 59 | 103 | 281 | 74 | 1 | PM2.5 |
| 2016 | 27 | 63 | 90 | 224 | 81 | 0 | PM2.5 |
| 2015 | 28 | 61 | 92 | 262 | 89 | 0 | PM2.5 |
| 2014 | 32 | 65 | 129 | 251 | 99 | 2 | PM2.5 |
What This Means for Juneau County Residents
Juneau, Alaska has received an Air Quality Grade of A (80/100) based on a decade of EPA monitoring data. The current median AQI of 24 falls in the "Good" range.
Encouragingly, air quality here has been improving, with the median AQI dropping by 8 points over the monitoring period. This trend suggests continued investment in emission controls and cleaner energy.
The primary pollutant affecting this area is Fine Particulate Matter (PM2.5). Over the past 5 years, this area has averaged 1 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.