Anchorage Air Quality in Spring
Across 2019–2025, Anchorage's spring (March–May) air quality had a median AQI of 30 (Good) over 644 monitored days in the Anchorage, AK area. 0.6% of spring days (4 of 644) reached Unhealthy for Sensitive Groups or worse, and coarse dust (PM10) set the daily AQI on 58.9% of days. The cleanest spring on record here was 2024 (median AQI 25, 0 days above 100) and the worst was 2019 (median 31, 2 days above 100, peak AQI 116).
- Good: 78.7%
- Moderate: 20.7%
- Unhealthy for Sensitive Groups: 0.6%
- Unhealthy or worse: 0.0%
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How is the air in Anchorage in spring?
Good on a typical day: median AQI 30 across 2019–2025, with 0.6% of spring days above AQI 100. Coarse dust (PM10) is the main driver.
- ✓78.7% of spring days were Good (AQI 0–50), 20.7% Moderate (51–100).
- ✓4 days of 644 reached AQI 101+; the spring peak was 141.
- ✓Cleanest month: May; worst month: April.
Frequently asked questions
What is the air quality like in Anchorage in spring?▾
Across 2019–2025, the median daily AQI in Anchorage in spring was 30 (Good). 78.7% of days were Good, 20.7% Moderate, and 0.6% reached Unhealthy for Sensitive Groups or worse, based on 644 monitored days in EPA's Air Quality System.
Is spring a good time for outdoor exercise in Anchorage?▾
A typical spring day in Anchorage sits in the Good range (median AQI 30), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of spring days reached AQI 101+ in 2019–2025.
Which pollutant causes Anchorage's spring air quality problems?▾
Coarse dust (PM10) set the daily AQI on 58.9% of spring days in Anchorage. The highest spring AQI recorded in 2019–2025 was 141 (Unhealthy for Sensitive Groups), in 2019.
Anchorage spring air quality, year by year
Anchorage spring air quality by year (Anchorage, AK, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 92 | 31 | 2 | 116 | PM2.5 |
| 2020 | 92 | 29 | 0 | 65 | PM2.5 |
| 2021 | 92 | 36 | 0 | 86 | PM2.5 |
| 2022 | 92 | 31 | 0 | 75 | PM10 |
| 2023 | 92 | 28 | 0 | 85 | PM10 |
| 2024cleanest | 92 | 25 | 0 | 69 | PM10 |
| 2025 | 92 | 26 | 2 | 141 | PM10 |
What spring air means in Anchorage
A typical spring day in Anchorage sits in the Good range (median AQI 30), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of spring days reached AQI 101+ in 2019–2025.
Spring's median AQI of 30 is in line with Anchorage's whole-year median of 27, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median Spring AQI across every EPA metro area (307,196 metro-days, 2019–2025) is 43, so Anchorage runs below the national Spring norm; 0.6% of its Spring days topped AQI 100 versus 0.8% nationally (about the same).
Within the season, May is the cleanest month (median AQI 25, 0.5% of days above 100) and April the worst (median 35, 1.0% above 100).
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 season 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.