Spokane Air Quality in 2019
In 2019, Spokane's air quality (Spokane-Spokane Valley, WA area) had a median daily AQI of 47 (Good) across 365 monitored days. 2 days (0.5%) reached Unhealthy for Sensitive Groups or worse, 207 were Good, and the year's peak AQI was 146 (Unhealthy for Sensitive Groups). Fine particulate matter (PM2.5) set the daily AQI on 229 of those days. The cleanest month of 2019 was April (median AQI 25, 0 days above 100) and the worst was August (median 45, 2 days above 100, peak 146).
- Good: 56.7%
- Moderate: 42.7%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
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How was Spokane's air quality in 2019?
Good on a typical day: median AQI 47, with 2 days above AQI 100 out of 365 monitored — the 2nd cleanest of 7 years on record for the area.
- ✓Peak AQI in 2019: 146 (Unhealthy for Sensitive Groups).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 229 days.
- ✓Cleanest month: April; worst: August.
Frequently asked questions
What was the average AQI in Spokane in 2019?▾
EPA's Air Quality System puts Spokane's (Spokane-Spokane Valley, WA) median daily AQI for 2019 at 47, which is Good. 2 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 146.
Which month had the worst air quality in Spokane in 2019?▾
The cleanest month of 2019 was April (median AQI 25, 0 days above 100) and the worst was August (median 45, 2 days above 100, peak 146).
Was 2019 a good or bad year for Spokane's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2019 ranks 2nd cleanest by days above AQI 100. 2019's median of 47 is in line with the area's typical annual median of 47.
Spokane month by month in 2019
Spokane air quality month by month, 2019 (Spokane-Spokane Valley, WA, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 60 | 0 | 100 | PM2.5 |
| February | 28 | 55 | 0 | 79 | PM2.5 |
| March | 31 | 53 | 0 | 81 | PM2.5 |
| Aprilcleanest | 30 | 25 | 0 | 52 | PM2.5 |
| May | 31 | 44 | 0 | 64 | O3 |
| June | 30 | 38 | 0 | 87 | O3 |
| July | 31 | 40 | 0 | 58 | O3 |
| Augustworst | 31 | 45 | 2 | 146 | O3 |
| September | 30 | 33 | 0 | 67 | O3 |
| October | 31 | 51 | 0 | 82 | PM2.5 |
| November | 30 | 67 | 0 | 85 | PM2.5 |
| December | 31 | 61 | 0 | 85 | PM2.5 |
How 2019 compares
Among the 7 years EPA has published for the area (2019–2025), 2019 ranks 2nd cleanest by days above AQI 100.
2019's median of 47 is in line with the area's typical annual median of 47.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Spokane
The latest EPA AirNow observation puts Spokane's AQI at 38 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Spokane air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Spokane-Spokane Valley, WA), 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.