Connecticut Air Quality by City
Connecticut has 9 cities with an air-quality page, from Hartford (990,793 people) on down. Each page leads with the live AQI, the main pollutant driving it, and a go/no-go for outdoor exercise on the EPA scale.
Cities in Connecticut
| City | Typical AQI (county median, 2025) | Population |
|---|---|---|
| Hartford | 42 Good | 990,793 |
| Bridgeport | 44 Good | 945,974 |
| New Haven | 43 Good | 567,250 |
| Waterbury | 43 Good | 202,514 |
| Danbury | 44 Good | 174,548 |
| Norwich | 38 Good | 166,930 |
| Stamford | 44 Good | 137,144 |
| Norwalk | 44 Good | 92,187 |
| Willimantic | 35 Good | 18,096 |
Our dataset lists 185 places in Connecticut; the 9 above have a page. For a smaller town, the nearest city above is the closest match.