Hartford vs New Haven Air Quality Comparison
Which city has cleaner air right now, from the latest EPA AirNow AQI
As of November 8, 2026, Hartford, CT and New Haven, CT have effectively the same air quality — both at AQI 15 (Good) in the latest EPA AirNow observations. Hartford's reading is driven by O3 and New Haven's by O3.
Hartford, CT
Good
New Haven, CT
Good
Summary
Both cities have similar air quality
Reduce Indoor Ozone in New Haven
Today's main pollutant in New Haven is ground-level ozone (AQI 15). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Compare activated-carbon purifiers (for gases & ozone):
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5-Day Forecast Comparison
| Day | Hartford | New Haven | Better |
|---|---|---|---|
| Today | AQI 33 | AQI 28 | New Haven |
| Sun, Nov 8 | AQI 44 | AQI 50 | Hartford |