Worst air pollution Ellensburg, today and tomorrow
Today (15 July): Air quality in Ellensburg is fair. PM2.5 and PM1 are fair; AQI, NO2, and O3 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 10:00 PM (NO2: 57.6/100).
Tomorrow (16 July 2026): Air quality in Ellensburg is fair. All pollutants stay as today. Pollution peaks around 3:00 AM (O3: 48.7/100). 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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In Ellensburg, dry Columbia Basin winds is the main influence on air quality, and wildfire smoke drifting from the Cascades is the main late-summer concern. These factors combine to give Ellensburg a fairly typical seasonal air quality pattern for this part of the country. As with most US destinations, conditions here are best understood by season rather than by a single yearly average.
Today - 15 July | Pollution peaks at 22:00
AQI:
Medium
57.6/100
PM2.5 (fine particles):
Fair
25.2/100
PM10 (coarse particles):
Good
8.8/100
NO2 (nitrogen dioxide):
Medium
57.6/100
O3 (ozone):
Medium
51.0/100
SO2 (sulfur dioxide):
Good
7.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.6/100
PM1 (ultrafine particles):
Fair
28.1/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 03:00
AQI:
Medium
48.7/100
PM2.5 (fine particles):
Fair
26.0/100
PM10 (coarse particles):
Good
9.8/100
NO2 (nitrogen dioxide):
Medium
45.8/100
O3 (ozone):
Medium
48.7/100
SO2 (sulfur dioxide):
Good
9.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.4/100
PM1 (ultrafine particles):
Fair
27.8/100
Pollen forecast in Ellensburg
View pollen forecastFrequently Asked Questions
Is air quality bad in Ellensburg right now?
On 15 July 2026, overall air quality in Ellensburg is fair. PM1 is the main pollutant at 28.1/100. Pollution peaks around 10:00 PM (NO2: 57.6/100).
Will air quality be worse tomorrow in Ellensburg?
On 16 July 2026, air quality conditions in Ellensburg will be similar to today, with PM1 forecast at fair at 27.8/100. Pollution peaks around 3:00 AM (O3: 48.7/100).
When is air pollution at its worst in Ellensburg?
Air quality in Ellensburg shifts across the year — rain-heavy winters keep the air unusually clean compared to much of the country, 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 Ellensburg 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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app