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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 Friday, 06/26/26

Good to Moderate
AQI Scale

For current conditions, see map below.

Cautionary Statements

AQI Forecast

Forecast for Friday, 06/26/26

Good to Moderate

Forecast for Saturday, 06/27/26

Good to Moderate

For local forecasts, see table below.

Restrictions For Regulated Community

Friday, 06/26/26

Restrictions Do Not Apply

Saturday, 06/27/26

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 Friday, 06/26/26
FineParticles (PM2.5)		 Friday, 06/26/26
Ozone (O3)		 Saturday, 06/27/26
FineParticles (PM2.5)		 Saturday, 06/27/26
Ozone (O3)
Bridgeport 54 77 52 51
Danbury 50 50 52 50
Greenwich 54 51 47 54
Hartford 44 49 50 47
Madison 52 100 50 49
Middletown 44 90 50 48
New Haven 52 71 52 51
New London-Groton 52 80 50 50
Stafford 39 64 39 56
Stratford 54 77 52 51
Torrington 39 45 39 46
Waterbury 50 90 52 48
Westport 54 74 52 51

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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.