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AirHistory

Air Quality in Oregon

10-year air quality trends for 23 monitored areas in Oregon.

See full Oregon air quality rankings →
23
Cities
34
Avg AQI (5yr)
6
Improving
5
Stable
12
Worsening

All Monitored Areas in Oregon

Jefferson, Oregon

Jefferson County · AQI 28 (5yr avg) · Improving · PM2.5

A

Wasco, Oregon

Wasco County · AQI 24 (5yr avg) · Improving · PM2.5

B

Union, Oregon

Union County · AQI 27 (5yr avg) · Improving · PM2.5

B

Deschutes, Oregon

Deschutes County · AQI 25 (5yr avg) · Improving · PM2.5

B

Benton, Oregon

Benton County · AQI 22 (5yr avg) · Stable · PM2.5

B

Crook, Oregon

Crook County · AQI 29 (5yr avg) · Improving · PM2.5

B

Columbia, Oregon

Columbia County · AQI 29 (5yr avg) · Stable · PM2.5

B

Baker, Oregon

Baker County · AQI 31 (5yr avg) · Stable · PM2.5

B

Clackamas, Oregon

Clackamas County · AQI 32 (5yr avg) · Stable · PM2.5

B

Lake, Oregon

Lake County · AQI 27 (5yr avg) · Stable · PM2.5

B

Wallowa, Oregon

Wallowa County · AQI 27 (5yr avg) · Stable · PM2.5

B

Washington, Oregon

Washington County · AQI 36 (5yr avg) · Stable · PM2.5

B

Multnomah, Oregon

Multnomah County · AQI 36 (5yr avg) · Stable · PM2.5

B

Linn, Oregon

Linn County · AQI 35 (5yr avg) · Worsening · PM2.5

C

Marion, Oregon

Marion County · AQI 37 (5yr avg) · Worsening · PM2.5

C

Umatilla, Oregon

Umatilla County · AQI 39 (5yr avg) · Stable · PM2.5

C

Jackson, Oregon

Jackson County · AQI 44 (5yr avg) · Stable · PM2.5

C

Grant, Oregon

Grant County · AQI 45 (5yr avg) · Worsening · PM2.5

C

Josephine, Oregon

Josephine County · AQI 38 (5yr avg) · Worsening · PM2.5

C

Lane, Oregon

Lane County · AQI 45 (5yr avg) · Stable · PM2.5

C

Harney, Oregon

Harney County · AQI 44 (5yr avg) · Worsening · PM2.5

C

Douglas, Oregon

Douglas County · AQI 36 (5yr avg) · Worsening · PM2.5

C

Klamath, Oregon

Klamath County · AQI 44 (5yr avg) · Stable · PM2.5

C
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Frequently Asked Questions

Oregon has 23 monitored areas with an average 5-year AQI of 34 and an average Air Quality Grade of B. 6 cities are improving, 12 are worsening, and 5 are stable.

Jefferson, Oregon has the best Air Quality Grade (A) in Oregon with a 5-year average AQI of 28.

Of 23 monitored areas in Oregon, 6 are showing improving trends, 12 are worsening, and 5 remain stable over the past decade.

Sources: EPA Air Quality System (AQS)
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