Chelan County, Washington
AQI 27 · Good27
Median AQI
52
90th Percentile
74
Max AQI
243
Days with Data
Ranked #19 of 31 counties in Washington (by median AQI, lower is better)
Monthly Median AQI — 2025
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27
Median AQI
52
90th Percentile
74
Max AQI
243
Days with Data
Ranked #19 of 31 counties in Washington (by median AQI, lower is better)
Click a bar to view that month's details