Air Quality Index

The U. S. Environmental Protection Agency (EPA) has provided a scale called the Air Quality Index (AQI) for rating air quality. This scale is based on the National Ambient Air Quality Standards (NAAQS). The AQI forecast is updated once daily, excluding weekends and holidays. Alternatively, you may call the Air Quality Index Hotline at (800) 249-1234 or (860) 424-4167 for the forecast or link to Airnow.gov for the most current air quality information.

Current air quality is provided below the AQI forecast section.

Current Air Quality

Air Quality for Sunday, 12/22/24

Good

For current conditions, see map below.

Cautionary Statements

AQI Forecast

Forecast for Sunday, 12/22/24

Good

Forecast for Monday, 12/23/24

Good to Moderate

For local forecasts, see table below.

Restrictions For Regulated Community

Ozone forecasting has come to a close. Ozone concentrations from October through April are expected to remain in the GOOD, to occasionally MODERATE range.

For details, see operating restrictions page.

Historical Ozone Data

Forecasted Ozone Exceedance Days

Tips for Ozone Action Days

Air Monitoring in Connecticut

AIRNOW Interactive Map of Air Quality

For more information, visit the AIRNow Interactive Map of Air Quality website.

Local AQI Forecast

Town	Sunday, 12/22/24 FineParticles (PM2.5)	Monday, 12/23/24 FineParticles (PM2.5)
Bridgeport	28	52
Danbury	22	50
Greenwich	28	52
Hartford	28	52
Madison	22	50
Middletown	28	52
New Haven	28	52
New London-Groton	22	50
Stafford	17	44
Stratford	28	52
Torrington	17	44
Waterbury	28	52
Westport	28	52

Receive AQI Notices

Receive AQI Notifications

If you have any questions regarding the Air Quality Forecast, please contact the Bureau of Air Management by phone at (860)424-4152 or by email.