Harris County, Texas
AQI 63 · Moderate63
Median AQI
100
90th Percentile
172
Max AQI
274
Days with Data
Ranked #44 of 45 counties in Texas (by median AQI, lower is better)
Monthly Median AQI — 2025
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63
Median AQI
100
90th Percentile
172
Max AQI
274
Days with Data
Ranked #44 of 45 counties in Texas (by median AQI, lower is better)
Click a bar to view that month's details