New Haven County, Connecticut
AQI 44 · Good44
Median AQI
67
90th Percentile
151
Max AQI
181
Days with Data
Ranked #8 of 8 counties in Connecticut (by median AQI, lower is better)
Monthly Median AQI — 2025
Click a bar to view that month's details
44
Median AQI
67
90th Percentile
151
Max AQI
181
Days with Data
Ranked #8 of 8 counties in Connecticut (by median AQI, lower is better)
Click a bar to view that month's details