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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, 06/20/26

Good
AQI Scale

For current conditions, see map below.

Cautionary Statements

AQI Forecast

Forecast for Saturday, 06/20/26

Good

Forecast for Sunday, 06/21/26

Good to Moderate

For local forecasts, see table below.

Restrictions For Regulated Community

Saturday, 06/20/26

Restrictions Do Not Apply

Sunday, 06/21/26

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, 06/20/26
FineParticles (PM2.5)		 Saturday, 06/20/26
Ozone (O3)		 Sunday, 06/21/26
FineParticles (PM2.5)		 Sunday, 06/21/26
Ozone (O3)
Bridgeport 22 29 39 58
Danbury 17 24 33 38
Greenwich 22 28 39 54
Hartford 22 26 39 35
Madison 17 33 17 64
Middletown 22 27 39 46
New Haven 11 28 28 54
New London-Groton 17 34 17 67
Stafford 11 25 17 36
Stratford 22 29 39 58
Torrington 11 26 17 35
Waterbury 17 27 33 46
Westport 22 29 39 58

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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.