Anchorage Air Quality in 2025
In 2025, Anchorage's air quality (Anchorage, AK area) had a median daily AQI of 27 (Good) across 365 monitored days. 3 days (0.8%) reached Unhealthy for Sensitive Groups or worse, 283 were Good, and the year's peak AQI was 141 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 210 of those days. The cleanest month of 2025 was July (median AQI 15, 0 days above 100) and the worst was April (median 29, 1 day above 100, peak 141).
- Good: 77.5%
- Moderate: 21.6%
- Unhealthy for Sensitive Groups: 0.8%
- Unhealthy or worse: 0.0%
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How was Anchorage's air quality in 2025?
Good on a typical day: median AQI 27, with 3 days above AQI 100 out of 365 monitored — the 5th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2025: 141 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 210 days.
- ✓Cleanest month: July; worst: April.
Frequently asked questions
What was the average AQI in Anchorage in 2025?▾
EPA's Air Quality System puts Anchorage's (Anchorage, AK) median daily AQI for 2025 at 27, which is Good. 3 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 141.
Which month had the worst air quality in Anchorage in 2025?▾
The cleanest month of 2025 was July (median AQI 15, 0 days above 100) and the worst was April (median 29, 1 day above 100, peak 141).
Was 2025 a good or bad year for Anchorage's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2025 ranks 5th cleanest by days above AQI 100. 2025's median of 27 is in line with the area's typical annual median of 27.
Anchorage month by month in 2025
Anchorage air quality month by month, 2025 (Anchorage, AK, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 23 | 1 | 106 | PM2.5 |
| February | 28 | 47 | 0 | 77 | PM2.5 |
| March | 31 | 47 | 1 | 110 | PM10 |
| Aprilworst | 30 | 29 | 1 | 141 | PM10 |
| May | 31 | 20 | 0 | 44 | PM10 |
| June | 30 | 19 | 0 | 40 | PM10 |
| Julycleanest | 31 | 15 | 0 | 34 | PM10 |
| August | 31 | 18 | 0 | 46 | PM10 |
| September | 30 | 28 | 0 | 50 | PM2.5 |
| October | 31 | 39 | 0 | 60 | PM2.5 |
| November | 30 | 53 | 0 | 71 | PM2.5 |
| December | 31 | 60 | 0 | 92 | PM2.5 |
How 2025 compares
Among the 7 years EPA has published for the area (2019–2025), 2025 ranks 5th cleanest by days above AQI 100.
2025's median of 27 is in line with the area's typical annual median of 27.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Anchorage
The latest EPA AirNow observation puts Anchorage's AQI at 18 (PM10). The figures above are multi-year annual statistics, not today's reading.
View current Anchorage air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Anchorage, AK), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.