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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 Saturday, 06/13/26

Good to Moderate
AQI Scale

For current conditions, see map below.

Cautionary Statements

AQI Forecast

Forecast for Saturday, 06/13/26

Good to Moderate

Forecast for Sunday, 06/14/26

Moderate

For local forecasts, see table below.

Restrictions For Regulated Community

Saturday, 06/13/26

Restrictions Do Not Apply

Sunday, 06/14/26

Restrictions Do Not Apply

For details, see operating restrictions page.

Historical Ozone Data
Forecasted Ozone Exceedance Days
Tips for Ozone Action Days
Air Monitoring in Connecticut


Local AQI Forecast

Town Saturday, 06/13/26
FineParticles (PM2.5)		 Saturday, 06/13/26
Ozone (O3)		 Sunday, 06/14/26
FineParticles (PM2.5)		 Sunday, 06/14/26
Ozone (O3)
Bridgeport 44 51 50 87
Danbury 39 50 44 93
Greenwich 44 54 50 97
Hartford 44 48 50 90
Madison 33 51 39 84
Middletown 44 50 50 84
New Haven 39 51 44 84
New London-Groton 33 50 39 80
Stafford 33 49 39 80
Stratford 44 51 50 87
Torrington 33 47 39 93
Waterbury 44 50 50 84
Westport 44 51 50 90

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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.