Anchorage Air Quality in April
Across 2019–2025, Anchorage's April air quality had a median AQI of 35 (Good) over 210 monitored days in the Anchorage, AK area. 1.0% of April days (2 of 210) reached Unhealthy for Sensitive Groups or worse, and coarse dust (PM10) set the daily AQI on 75.2% of days. The cleanest April on record here was 2020 (median AQI 28, 0 days above 100) and the worst was 2019 (median 33, 1 day above 100, peak AQI 107).
- Good: 69.5%
- Moderate: 29.5%
- Unhealthy for Sensitive Groups: 1.0%
- Unhealthy or worse: 0.0%
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How is the air in Anchorage in April?
Good on a typical day: median AQI 35 across 2019–2025, with 1.0% of April days above AQI 100. Coarse dust (PM10) is the main driver.
- ✓69.5% of April days were Good (AQI 0–50), 29.5% Moderate (51–100).
- ✓2 days of 210 reached AQI 101+; the April peak was 141.
- ✓Best April: 2020; worst April: 2019.
Frequently asked questions
What is the air quality like in Anchorage in April?▾
Across 2019–2025, the median daily AQI in Anchorage in April was 35 (Good). 69.5% of days were Good, 29.5% Moderate, and 1.0% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is April a good time for outdoor exercise in Anchorage?▾
A typical April day in Anchorage sits in the Good range (median AQI 35), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 100 of April days (1.0%) reached AQI 101+ in 2019–2025.
Which pollutant causes Anchorage's April air quality problems?▾
Coarse dust (PM10) set the daily AQI on 75.2% of April days in Anchorage. The highest April AQI recorded in 2019–2025 was 141 (Unhealthy for Sensitive Groups), in 2019.
Anchorage April air quality, year by year
Anchorage April air quality by year (Anchorage, AK, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019worst | 30 | 33 | 1 | 107 | PM10 |
| 2020cleanest | 30 | 28 | 0 | 63 | PM2.5 |
| 2021 | 30 | 47 | 0 | 86 | PM10 |
| 2022 | 30 | 46 | 0 | 75 | PM10 |
| 2023 | 30 | 35 | 0 | 71 | PM10 |
| 2024 | 30 | 43 | 0 | 69 | PM10 |
| 2025 | 30 | 29 | 1 | 141 | PM10 |
What April air means in Anchorage
A typical April day in Anchorage sits in the Good range (median AQI 35), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 100 of April days (1.0%) reached AQI 101+ in 2019–2025.
April's median AQI of 35 is above Anchorage's whole-year median of 27, making it one of the area's dirtier periods. Nationally, the median April AQI across every EPA metro area (100,677 metro-days, 2019–2025) is 44, so Anchorage runs below the national April norm; 1.0% of its April days topped AQI 100 versus 0.7% nationally (about the same).
April is part of Anchorage's spring season (March, April, May); the spring page pools all three months.
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 month 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.