AQI 34 · PM2.5 · Trend: Stable
| Average AQI | 34 |
| Good Days / Year | 290 |
| Unhealthy Days / Year | 3 |
| Primary Pollutant | PM2.5 |
| PM2.5 Average | 5.8 µg/m³ |
| Trend | → Stable |
| Monitoring Stations | 10 |
| Nonattainment Areas | 0 |
New Hampshire enjoys excellent air quality thanks to its forested landscape, low population density, and strong New England environmental regulations. The White Mountains region has some of the cleanest monitored air in the eastern US.
NH DES Air Resources Division manages standards. Member of RGGI. Strong clean air protections.
No nonattainment areas. New Hampshire has among the cleanest air in the United States.