Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
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PM2.5 Air Quality Index (AQI) maps are based on the midnight to midnight 24-hour PM2.5 AQI measured at each PM2.5 monitoring station.
Click each state on the map of New England below to view the peak PM2.5 AQI for each monitor in that state.
