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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 Tuesday, 06/02/26

Good
AQI Scale

For current conditions, see map below.

Cautionary Statements

AQI Forecast

Forecast for Tuesday, 06/02/26

Good

Forecast for Wednesday, 06/03/26

Good

For local forecasts, see table below.

Restrictions For Regulated Community

Tuesday, 06/02/26

Restrictions Apply

Wednesday, 06/03/26

Restrictions 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 Tuesday, 06/02/26
FineParticles (PM2.5)		 Tuesday, 06/02/26
Ozone (O3)		 Wednesday, 06/03/26
FineParticles (PM2.5)		 Wednesday, 06/03/26
Ozone (O3)
Bridgeport 28 40 22 48
Danbury 22 36 22 41
Greenwich 28 41 22 47
Hartford 28 37 28 47
Madison 22 42 22 50
Middletown 28 39 28 48
New Haven 28 38 22 44
New London-Groton 22 43 22 50
Stafford 17 34 17 43
Stratford 28 40 22 48
Torrington 17 35 17 43
Waterbury 22 39 28 48
Westport 28 41 22 48

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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.