~35 (Good)
Median AQI
~20/year
Days with wildfire smoke advisories
2 (Missoula, Lincoln)
Counties in nonattainment
>200 (Hazardous)
Worst AQI recorded (2023)
Historical data
Coming soon
Long-run charts for this indicator are on the way.
Compared to the United States
| Indicator | Montana | United States |
|---|---|---|
| Median annual AQI | 35 | 42 |
National ranking
Montana ranks #29 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
Montana air quality is typically good but suffers seasonal degradation from regional wildfire smoke, especially in valley communities like Missoula. Montana air quality monitoring has expanded due to recurring summer smoke events.
Did you know?
- Missoula's valley geography traps wildfire smoke, historically giving it some of the worst air days in the state.