Worst air pollution Spokane Valley, today and tomorrow
Today (9 August): Air quality in Spokane Valley is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 AM (O3: 37.8/100).
Tomorrow (10 August 2026): Air quality in Spokane Valley is fair. All pollutants stay as today. Pollution peaks around 10:00 AM (O3: 24.8/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Spokane Valley's air quality reflects the Spokane River valley's partial topographic enclosure in eastern Washington's Inland Northwest, with vehicle emissions from I-90 the primary local source in Spokane County's most populous suburb. Summer wildfire smoke from surrounding Idaho, Washington, and Montana forests is an increasingly severe seasonal concern, while winter temperature inversions can trap wood-burning and vehicle emissions in the valley for extended periods.
Today - 9 August | Pollution peaks at 05:00
AQI:
Fair
37.8/100
PM2.5 (fine particles):
Good
10.1/100
PM10 (coarse particles):
Good
7.9/100
NO2 (nitrogen dioxide):
Good
6.6/100
O3 (ozone):
Fair
37.8/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.3/100
PM1 (ultrafine particles):
Good
5.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 10:00
AQI:
Fair
24.8/100
PM2.5 (fine particles):
Good
5.4/100
PM10 (coarse particles):
Good
3.6/100
NO2 (nitrogen dioxide):
Good
6.7/100
O3 (ozone):
Fair
24.8/100
SO2 (sulfur dioxide):
Good
1.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.1/100
PM1 (ultrafine particles):
Good
3.8/100
Pollen forecast in Spokane Valley
View pollen forecastFrequently Asked Questions
Is air quality bad in Spokane Valley right now?
On 9 August 2026, overall air quality in Spokane Valley is fair. AQI is the main air quality indicator at 37.8/100. Pollution peaks around 5:00 AM (O3: 37.8/100).
Will air quality be worse tomorrow in Spokane Valley?
On 10 August 2026, air quality conditions in Spokane Valley will be similar to today, with AQI forecast at fair at 24.8/100. Pollution peaks around 10:00 AM (O3: 24.8/100).
When is air pollution at its worst in Spokane Valley?
Spokane Valley's air quality follows a clear seasonal pattern. In short, spring is often the freshest stretch, sandwiched between winter rain and summer fire season, whereas the driest weeks of late summer bring the greatest risk of smoke drifting in from regional wildfires. Coastal areas see relatively little of the smoke that can settle into inland valleys during fire season.
Are air quality levels in Spokane Valley based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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