Asotin County, Washington
AQI 35 · Good35
Median AQI
65
90th Percentile
151
Max AQI
240
Days with Data
Ranked #25 of 31 counties in Washington (by median AQI, lower is better)
Monthly Median AQI — 2025
Click a bar to view that month's details
35
Median AQI
65
90th Percentile
151
Max AQI
240
Days with Data
Ranked #25 of 31 counties in Washington (by median AQI, lower is better)
Click a bar to view that month's details