Where is the air worst in Connecticut right now?

Cornwall has the highest current reading at AQI 46 (Good).

How often are readings updated?

Monitors report every hour. We refresh this page with the latest hour from EPA AirNow.

Connecticut Air Quality

Current AQI at 9 monitors, highest 46 (Good) · Measured 10/26/2026, 3:00 PM PT

Monitors: 9
Highest AQI: 46; Good
Typical (median): 42; Good
Above 100: 0

Monitoring sites in Connecticut

Worst first. Times are local.

46CornwallGood · Ozone · Mon 10/26/2026, 5:00 PM EDT
45AbingtonGood · Ozone · Mon 10/26/2026, 5:00 PM EDT
44BridgeportGood · Fine particles (PM2.5) · Mon 10/26/2026, 5:00 PM EDT
43New HavenGood · Fine particles (PM2.5) · Mon 10/26/2026, 5:00 PM EDT
42East HartfordGood · Ozone · Mon 10/26/2026, 5:00 PM EDT
30GrotonGood · Fine particles (PM2.5) · Mon 10/26/2026, 5:00 PM EDT
28WaterburyGood · Fine particles (PM2.5) · Mon 10/26/2026, 5:00 PM EDT
27HartfordGood · Fine particles (PM2.5) · Mon 10/26/2026, 5:00 PM EDT
24DanburyGood · Fine particles (PM2.5) · Mon 10/26/2026, 5:00 PM EDT

By county

Highest current AQI among the county's monitors

What the AQI means

0-50Good. Air quality is satisfactory and poses little or no risk.
51-100Moderate. Acceptable. A few unusually sensitive people may have symptoms.
101-150Unhealthy for Sensitive Groups. People with heart or lung disease, older adults, children and teens should limit long or heavy outdoor exertion.
151-200Unhealthy. Everyone may begin to feel effects. Sensitive groups should avoid long or heavy outdoor exertion.
201-300Very Unhealthy. Health alert: the risk of health effects is increased for everyone.
301-500Hazardous. Health warning of emergency conditions. Everyone is more likely to be affected.

Frequently asked questions

Where is the air worst in Connecticut right now?: Cornwall has the highest current reading at AQI 46 (Good).
How often are readings updated?: Monitors report every hour. We refresh this page with the latest hour from EPA AirNow.

Source: EPA AirNow · Last updated 10/26/2026 · Data are preliminary and subject to change

Nearby states

Data sources

AirNowU.S. Environmental Protection Agency

Data as of 10/26/2026

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About this data

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