Multnomah County, Oregon
AQI 38 · Good38
Median AQI
55
90th Percentile
87
Max AQI
182
Days with Data
Ranked #18 of 21 counties in Oregon (by median AQI, lower is better)
Monthly Median AQI — 2025
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38
Median AQI
55
90th Percentile
87
Max AQI
182
Days with Data
Ranked #18 of 21 counties in Oregon (by median AQI, lower is better)
Click a bar to view that month's details