Washington County, Utah
AQI 45 · Good45
Median AQI
64
90th Percentile
97
Max AQI
304
Days with Data
Ranked #4 of 17 counties in Utah (by median AQI, lower is better)
Monthly Median AQI — 2025
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45
Median AQI
64
90th Percentile
97
Max AQI
304
Days with Data
Ranked #4 of 17 counties in Utah (by median AQI, lower is better)
Click a bar to view that month's details