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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, 06/16/26

Good
AQI Scale

For current conditions, see map below.

Cautionary Statements

AQI Forecast

Forecast for Tuesday, 06/16/26

Good to Moderate

Forecast for Wednesday, 06/17/26

Good

For local forecasts, see table below.

Restrictions For Regulated Community

Tuesday, 06/16/26

Restrictions Do Not Apply

Wednesday, 06/17/26

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 Tuesday, 06/16/26
FineParticles (PM2.5)		 Tuesday, 06/16/26
Ozone (O3)		 Wednesday, 06/17/26
FineParticles (PM2.5)		 Wednesday, 06/17/26
Ozone (O3)
Bridgeport 33 61 44 48
Danbury 22 49 33 49
Greenwich 33 58 44 48
Hartford 28 50 28 46
Madison 17 58 22 43
Middletown 28 50 28 44
New Haven 33 54 28 43
New London-Groton 17 51 22 44
Stafford 17 44 33 43
Stratford 33 61 44 48
Torrington 17 43 33 50
Waterbury 28 50 33 44
Westport 33 64 44 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.