Oregon Air Quality by City
Oregon has 11 cities with an air-quality page, from Portland (2,115,140 people) on down. Each page leads with the live AQI, the main pollutant driving it, and a go/no-go for outdoor exercise on the EPA scale.
Cities in Oregon
| City | Typical AQI (county median, 2025) | Population |
|---|---|---|
| Portland | 37 Good | 2,115,140 |
| Eugene | 46 Good | 272,404 |
| Salem | 35 Good | 268,719 |
| Medford | 43 Good | 170,502 |
| Grants Pass | 33 Good | 39,311 |
| Glide | 53 Moderate (2022) | 1,823 |
| Mission | 41 Good | 878 |
| Weston | 41 Good | 443 |
| Mount Vernon | 37 Good | 364 |
| Dayville | 37 Good | 206 |
| Biggs Junction | No EPA monitor | 0 |
Our dataset lists 425 places in Oregon; the 11 above have a page. For a smaller town, the nearest city above is the closest match.