SmogRank / Countries / United States / Oregon
Most polluted cities in Oregon, United States
27 measured cities ranked by PM2.5, last 30 days. Worst: Gresham at 6.5 µg/m³, #1036 in the world.
| # | City | µg/m³ | |
|---|---|---|---|
| 1 | Gresham Oregon | 6.5 | |
| 2 | Tigard Oregon | 6.1 | |
| 3 | The Dalles Oregon | 5.3 | |
| 4 | Hermiston Oregon | 4.9 | |
| 5 | Canby Oregon | 4.8 | |
| 6 | Portland Oregon | 4.5 | |
| 7 | Salem Oregon | 4.5 | |
| 8 | Eugene Oregon | 4.4 | |
| 9 | Albany Oregon | 4.3 | |
| 10 | Altamont Oregon | 4.3 | |
| 11 | Beaverton Oregon | 4.3 | |
| 12 | Forest Grove Oregon | 4.3 | |
| 13 | Hillsboro Oregon | 4.1 | |
| 14 | Ashland Oregon | 4.0 | |
| 15 | Bend Oregon | 4.0 | |
| 16 | Pendleton Oregon | 4.0 | |
| 17 | Woodburn Oregon | 3.9 | |
| 18 | McMinnville Oregon | 3.8 | |
| 19 | Medford Oregon | 3.8 | |
| 20 | Coos Bay Oregon | 3.7 | |
| 21 | Grants Pass Oregon | 3.5 | |
| 22 | Milwaukie Oregon | 3.5 | |
| 23 | Dallas Oregon | 3.4 | |
| 24 | Oregon City Oregon | 3.4 | |
| 25 | Redmond Oregon | 3.2 | |
| 26 | Roseburg Oregon | 3.2 | |
| 27 | Corvallis Oregon | 3.1 |
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data
Estimated: cities without a monitor
Oregon cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Springfield estimated | ≈ 3 µg/m³ |
| Aloha estimated | ≈ 3 µg/m³ |
| Lake Oswego estimated | ≈ 3 µg/m³ |
| Keizer estimated | ≈ 2 µg/m³ |
| Tualatin estimated | ≈ 3 µg/m³ |
| West Linn estimated | ≈ 3 µg/m³ |
| Newberg estimated | ≈ 3 µg/m³ |
| Wilsonville estimated | ≈ 3 µg/m³ |
| Klamath Falls estimated | ≈ 2 µg/m³ |
| Bethany estimated | ≈ 3 µg/m³ |
| Hayesville estimated | ≈ 3 µg/m³ |
| Sherwood estimated | ≈ 3 µg/m³ |
| Happy Valley estimated | ≈ 4 µg/m³ |
| Central Point estimated | ≈ 3 µg/m³ |
| Troutdale estimated | ≈ 4 µg/m³ |
| Oak Grove estimated | ≈ 3 µg/m³ |
| Lebanon estimated | ≈ 3 µg/m³ |
| Four Corners estimated | ≈ 3 µg/m³ |
Updated 2026-10-01 13:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.