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, 08/14/26

Good to Moderate

For current conditions, see map below.

Cautionary Statements

AQI Forecast

Forecast for Friday, 08/14/26

Good

For local forecasts, see table below.

Restrictions For Regulated Community

Friday, 08/14/26

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

For more information, visit the AIRNow Interactive Map of Air Quality website.

Local AQI Forecast

Town	Friday, 08/14/26 FineParticles (PM2.5)	Friday, 08/14/26 Ozone (O3)
Bridgeport	39	37
Danbury	33	28
Greenwich	39	36
Hartford	28	26
Madison	28	33
Middletown	28	27
New Haven	33	31
New London-Groton	28	31
Stafford	22	27
Stratford	39	37
Torrington	22	24
Waterbury	33	27
Westport	39	37

Receive AQI Notices

DEEP Air Quality Information
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DEEP Ozone Forecast
Subscribe to receive a daily 8-hour ozone forecast for Connecticut's Industrial and Electric Generating Units' combustion sources from May 1 through September 30.
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.