Grays Harbor County, Washington
AQI 19 · Good19
Median AQI
36
90th Percentile
76
Max AQI
243
Days with Data
Ranked #6 of 31 counties in Washington (by median AQI, lower is better)
Monthly Median AQI — 2025
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19
Median AQI
36
90th Percentile
76
Max AQI
243
Days with Data
Ranked #6 of 31 counties in Washington (by median AQI, lower is better)
Click a bar to view that month's details