~290 days/year
Good air quality days
~35
Average AQI
Top 10 cleanest states
Rank
Historical data
Coming soon
Long-run charts for this indicator are on the way.
Compared to the United States
| Indicator | New Hampshire | United States |
|---|---|---|
| Average AQI | 35 | 42 |
National ranking
New Hampshire ranks #30 of 33 states by average pm2.5.
| #1 | Kentucky | 0 |
| #2 | Louisiana | 0 |
| #3 | Vermont | 4 |
| #4 | Wyoming | 4 |
| #5 | South Dakota | 5.5 |
| #6 | Maine | 5.5 |
| #7 | Massachusetts | 6.4 |
| #8 | Rhode Island | 6.8 |
| #9 | Florida | 6.9 |
| #10 | New York | 6.9 |
| #11 | Delaware | 7 |
| #12 | Virginia | 7.6 |
| #13 | Wisconsin | 7.6 |
| #14 | Washington | 7.6 |
| #15 | Michigan | 8 |
| #16 | Tennessee | 8.1 |
| #17 | North Carolina | 8.1 |
| #18 | New Jersey | 8.4 |
| #19 | Missouri | 8.4 |
| #20 | Arizona | 8.5 |
| #21 | Georgia | 8.7 |
| #22 | Indiana | 8.9 |
| #23 | Ohio | 9.1 |
| #24 | Illinois | 9.1 |
| #25 | Minnesota | 10 |
| #26 | Utah | 18 |
| #27 | Colorado | 25 |
| #28 | Alaska | 30 |
| #29 | Montana | 35 |
| #30 | New Hampshire | 35 |
| #31 | Texas | 48 |
| #32 | Oregon | 85% |
| #33 | New Mexico | 300 |
Overview
Air quality in New Hampshire remains consistently good, with an average AQI near 35 and about 290 "good" air quality days each year. New Hampshire benefits from limited heavy industry and strong forest coverage that supports clean air.
Did you know?
- New Hampshire is one of the most forested states in the country, covering about 80% of its land area.