Worst air pollution Eugene, today and tomorrow
Today (15 July): Air quality in Eugene is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (O3: 37.5/100).
Tomorrow (16 July 2026): Air quality in Eugene is fair. All pollutants stay as today. Pollution peaks around 7:00 AM (O3: 35.5/100). 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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Eugene's air quality reflects the Willamette Valley's partial topographic enclosure between the Coast Range to the west and the Cascades to the east, with wood-burning stoves in residential areas generating winter PM2.5 and vehicle emissions from I-5 contributing the primary local sources. Summer wildfire smoke from Oregon's forests is an increasingly severe seasonal concern, while the valley's topographic trap concentrates emissions under winter temperature inversions and fog.
Today - 15 July | Pollution peaks at 06:00
AQI:
Fair
37.5/100
PM2.5 (fine particles):
Good
15.2/100
PM10 (coarse particles):
Good
6.4/100
NO2 (nitrogen dioxide):
Good
16.2/100
O3 (ozone):
Fair
37.5/100
SO2 (sulfur dioxide):
Good
2.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.5/100
PM1 (ultrafine particles):
Good
12.6/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 07:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
13.7/100
PM10 (coarse particles):
Good
8.1/100
NO2 (nitrogen dioxide):
Good
9.9/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
10.8/100
Pollen forecast in Eugene
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Frequently Asked Questions
Is air quality bad in Eugene right now?
On 15 July 2026, overall air quality in Eugene is fair. AQI is the main air quality indicator at 37.5/100. Pollution peaks around 6:00 AM (O3: 37.5/100).
Will air quality be worse tomorrow in Eugene?
On 16 July 2026, air quality conditions in Eugene will be similar to today, with AQI forecast at fair at 35.5/100. Pollution peaks around 7:00 AM (O3: 35.5/100).
When is air pollution at its worst in Eugene?
Eugene follows a fairly predictable seasonal air quality pattern — 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 Eugene 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