Region 1: EPA New England

Today's Air Quality Maps

0-50 Good
51-100 Moderate
101-150 USG*
151-200 Unhealthy
201-300 Very Unhealthy
301+ Hazardous
*Unhealthy for Sensitive Groups


These maps are created by the Air Quality Mapping System from ozone and particle data gathered from a nationwide network of state and local air monitoring stations. The maps show the higher of the estimated ozone AQI and PM2.5 AQI. Each AQI value is calculated in accordance with EPA's Air Quality Index for ozone and particle pollution.