Montana air quality today
Today's readings across Montana: Billings has the highest reading at Moderate, and 7 of 25 tracked cities rate Good. Click any city for the pollutants behind its number and what they mean for time outside.
Cities in Montana
| City | Air quality today | EPA level |
|---|---|---|
| Billings Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Missoula Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Great Falls Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Butte Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Helena Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Saint Ignatius Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Florence Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Havre Air Quality | Moderateas of Jul 28 | 2 of 6 |
| West Glacier Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Seeley Lake Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Stevensville Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Deer Lodge Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Hamilton Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Clancy Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Circle Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Livingston Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Corvallis Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Ronan Air Quality | Moderateas of Jul 28 | 2 of 6 |
| Bozeman Air Quality | Goodas of Jul 28 | 1 of 6 |
| Kalispell Air Quality | Goodas of Jul 28 | 1 of 6 |
| Whitefish Air Quality | Goodas of Jul 28 | 1 of 6 |
| West Yellowstone Air Quality | Goodas of Jul 28 | 1 of 6 |
| Eureka Air Quality | Goodas of Jul 28 | 1 of 6 |
| Columbia Falls Air Quality | Goodas of Jul 28 | 1 of 6 |
| Roundup Air Quality | Goodas of Jul 28 | 1 of 6 |
| Belgrade Air Quality | No live reading | Not available |
| Drummond Air Quality | No live reading | Not available |
| Lewistown Air Quality | No live reading | Not available |
| Grass Range Air Quality | No live reading | Not available |
| Alberton Air Quality | No live reading | Not available |
| Ennis Air Quality | No live reading | Not available |
| Pleasant Prairie Air Quality | No live reading | Not available |
| Lakeside Air Quality | No live reading | Not available |
| Babb Air Quality | No live reading | Not available |
Readings use the EPA's six-level scale, from Good (1) to Hazardous (6), and update daily. Cities without a reading refresh the next time their page loads.
How to read these numbers
The air quality index tracks pollution: ozone, fine particles (PM2.5), dust, and exhaust. Good and Moderate days are fine for almost everyone. At Unhealthy for Sensitive Groups, people with asthma or a heart condition feel it first. Unhealthy and above means everyone should cut back time outside.
Pollen is not part of this score. A Good air day in Montana can still be a rough allergy day, so check Montana pollen levels too before you plan a long day outside.