Oregon(OR)

Air quality overview and monitoring data — 2025

414

Monitoring Sites

8,630

Active Monitors

32

Counties with Data

92

Cities Monitored

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County Air Quality

CountyMedian AQI90th %ileMax AQIGoodModerateUSGUnhealthy
Deschutes2243581691200
Jefferson2255771572400
Union2242701681300
Wallowa2348621651600
Wasco2342651681300
Crook2455751463500
Lake24661051493010
Linn2456891532800
Baker2552681612000
Columbia254069175600
Harney2660931285300
Clackamas2746901691100
Josephine31611091384210
Klamath3266831295200
Grant3469861206000
Marion3454851542700
Washington3654881542800
Multnomah3855871503200
Umatilla3957791443700
Jackson4266801344700
Lane42641171176040

Pollutant Trends

Ozone

No data available

PM2.5

No data available

PM10

No data available

CO

No data available

NO2

No data available

SO2

No data available