Right now
27 µg/m³ Moderate
Median NowCast across reporting stations
Worst right now: Libby — 45 µg/m³ (Unhealthy for Sensitive Groups)
19 of 22 stations reporting in the last 6 hours
Stations by air-quality category
Good · 1Moderate · 15Unhealthy for Sensitive Groups · 3
Highest readings right now
Libby45 µg/m³Unhealthy (sensitive)
Great Falls39 µg/m³Unhealthy (sensitive)
Columbia Falls37 µg/m³Unhealthy (sensitive)
Thompson Falls35 µg/m³Moderate
Frenchtown33 µg/m³Moderate
All stations (22)
| Station | NowCast | Category | 48 h forecast peak |
|---|---|---|---|
| Libby | 45 µg/m³ | Unhealthy for Sensitive Groups | 101 µg/m³ |
| Great Falls | 39 µg/m³ | Unhealthy for Sensitive Groups | 90 µg/m³ |
| Columbia Falls | 37 µg/m³ | Unhealthy for Sensitive Groups | 168 µg/m³ |
| Thompson Falls | 35 µg/m³ | Moderate | 59 µg/m³ |
| Frenchtown | 33 µg/m³ | Moderate | >500 µg/m³ |
| Cut Bank | 32 µg/m³ | Moderate | 124 µg/m³ |
| Hamilton | 31 µg/m³ | Moderate | >500 µg/m³ |
| Sleeping Giant | 31 µg/m³ | Moderate | 122 µg/m³ |
| Helena | 29 µg/m³ | Moderate | 117 µg/m³ |
| Butte | 27 µg/m³ | Moderate | 80 µg/m³ |
| Lewistown | 27 µg/m³ | Moderate | 77 µg/m³ |
| Missoula | 25 µg/m³ | Moderate | >500 µg/m³ |
| Bozeman EBAM | 24 µg/m³ | Moderate | 66 µg/m³ |
| Glasgow EBAM | 19 µg/m³ | Moderate | 20 µg/m³ |
| Billings | 19 µg/m³ | Moderate | 73 µg/m³ |
| Havre | 16 µg/m³ | Moderate | 42 µg/m³ |
| Malta | 12 µg/m³ | Moderate | 18 µg/m³ |
| Dillon | 11 µg/m³ | Moderate | >500 µg/m³ |
| Glendive EBAM | 4 µg/m³ | Good | 61 µg/m³ |
| Choteau | — no recent data | — | 88 µg/m³ |
| Seeley Lake | — no recent data | — | 136 µg/m³ |
| West Yellowstone | — no recent data | — | 101 µg/m³ |