Air Quality Alert issued statewide for Fine Particles on July 15-16, 2026 due to wildfire smoke from southern Ontario. 

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 Thursday, 07/16/26

Moderate to Unhealthy
AQI Scale

For current conditions, see map below.

Cautionary Statements

AQI Forecast

Forecast for Thursday, 07/16/26

Unhealthy For Sensitive Groups to Unhealthy

Forecast for Friday, 07/17/26

Moderate

For local forecasts, see table below.

Restrictions For Regulated Community

Thursday, 07/16/26

Restrictions Do Not Apply

Friday, 07/17/26

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 Thursday, 07/16/26
FineParticles (PM2.5)		 Thursday, 07/16/26
Ozone (O3)		 Friday, 07/17/26
FineParticles (PM2.5)		 Friday, 07/17/26
Ozone (O3)
Bridgeport 185 67 89 44
Danbury 182 54 78 34
Greenwich 185 51 89 38
Hartford 149 58 73 36
Madison 136 77 82 44
Middletown 149 64 73 37
New Haven 175 64 86 38
New London-Groton 136 64 82 40
Stafford 171 51 65 36
Stratford 185 67 89 44
Torrington 171 51 65 35
Waterbury 178 64 80 37
Westport 185 71 89 44

Receive AQI Notices

  • DEEP Air Quality Information 

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  • DEEP Ozone Forecast 

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  • EnviroFlash 

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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.