Spokane’s air quality was impacted by smoke on several days this past summer. There were a total of 14 days that failed the health-based standard for fine smoke particles (PM2.5); 3 days occurred in July and 11 in August. In fact, the 11 days in August marked the longest stretch of consecutive “bad air” days from wildfires since wildfire smoke (PM2.5) monitoring began in 1999.
In terms of smoke concentration, the worst day was Friday, July 17, when the 24-hour average maximum PM2.5 concentration was 130.6 micrograms per cubic meter of air, or an AQI of 206. For reference, the 24-hour standard for PM2.5 is 35 micrograms per cubic meter of air (AQI of 100).
We maintain this list of days when PM2.5 failed clean air standards since 1999. The list includes the date, the concentration, the corresponding AQI, and the cause.
Below is an annual comparative bar graph of wildfire smoke impacts followed by a graph of July and August, 2026.
To learn more about wildfire smoke, visit this page.
