Idaho Air Quality by City
Idaho has 14 cities with an air-quality page, from Boise (448,305 people) on down. Each page leads with the live AQI, the main pollutant driving it, and a go/no-go for outdoor exercise on the EPA scale.
Cities in Idaho
| City | Typical AQI (county median, 2025) | Population |
|---|---|---|
| Boise | 42 Good | 448,305 |
| Nampa | 36 Good | 201,956 |
| Coeur d'Alene | 31 Good | 131,592 |
| Meridian | 42 Good | 130,138 |
| Post Falls | 31 Good | 43,391 |
| Rexburg | No EPA monitor | 40,543 |
| Rathdrum | 31 Good | 10,874 |
| Malad City | No EPA monitor | 2,601 |
| Aberdeen | No EPA monitor | 2,564 |
| Avimor | 42 Good | 586 |
| Crouch | 42 Good | 214 |
| St. Charles | No EPA monitor | 145 |
| Conkling Park | 31 Good | 123 |
| White Bird | 40 Good | 57 |
Our dataset lists 236 places in Idaho; the 14 above have a page. For a smaller town, the nearest city above is the closest match.