SmogRank / Countries / United States / Oregon

Most polluted cities in Oregon, United States

27 measured cities ranked by PM2.5, last 7 days. Worst: The Dalles at 6.6 µg/m³, #1356 in the world.

#City µg/m³
1The Dalles Oregon
6.6
2Gresham Oregon
5.7
3Tigard Oregon
4.7
4Portland Oregon
3.8
5Hermiston Oregon
3.7
6Salem Oregon
3.7
7Pendleton Oregon
3.6
8Albany Oregon
3.5
9Coos Bay Oregon
3.5
10Eugene Oregon
3.5
11Ashland Oregon
3.4
12Canby Oregon
3.4
13Altamont Oregon
3.3
14Medford Oregon
3.3
15Milwaukie Oregon
3.3
16Forest Grove Oregon
3.2
17Woodburn Oregon
3.2
18Beaverton Oregon
3.1
19Grants Pass Oregon
3.1
20Bend Oregon
3.0
21Hillsboro Oregon
3.0
22Roseburg Oregon
3.0
23McMinnville Oregon
2.6
24Oregon City Oregon
2.6
25Corvallis Oregon
2.2
26Redmond Oregon
2.1
27Dallas Oregon
1.9
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.

City7-day estimateBand
Springfield estimated≈ 3 µg/m³Good
Aloha estimated≈ 3 µg/m³Good
Lake Oswego estimated≈ 3 µg/m³Good
Keizer estimated≈ 2 µg/m³Good
Tualatin estimated≈ 3 µg/m³Good
West Linn estimated≈ 3 µg/m³Good
Newberg estimated≈ 3 µg/m³Good
Wilsonville estimated≈ 3 µg/m³Good
Klamath Falls estimated≈ 2 µg/m³Good
Bethany estimated≈ 3 µg/m³Good
Hayesville estimated≈ 3 µg/m³Good
Sherwood estimated≈ 3 µg/m³Good
Happy Valley estimated≈ 4 µg/m³Good
Central Point estimated≈ 3 µg/m³Good
Troutdale estimated≈ 4 µg/m³Good
Oak Grove estimated≈ 3 µg/m³Good
Lebanon estimated≈ 3 µg/m³Good
Four Corners estimated≈ 3 µg/m³Good

Updated 2026-10-01 06:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.