New Hampshire Air Quality by City
New Hampshire has 5 cities with an air-quality page, from Nashua (240,705 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 New Hampshire
| City | Typical AQI (county median, 2025) | Population |
|---|---|---|
| Nashua | 38 Good | 240,705 |
| Manchester | 38 Good | 167,888 |
| Dover | No EPA monitor | 74,236 |
| Laconia | 32 Good | 17,085 |
| Franklin | 37 Good | 8,799 |
Our dataset lists 41 places in New Hampshire; the 5 above have a page. For a smaller town, the nearest city above is the closest match.