Colorado Air Quality by City
Colorado has 32 cities with an air-quality page, from Denver (2,714,768 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 Colorado
| City | Typical AQI (county median, 2025) | Population |
|---|---|---|
| Denver | 50 Good | 2,714,768 |
| Colorado Springs | 46 Good | 643,336 |
| Aurora | 48 Good | 394,432 |
| Fort Collins | 50 Good | 336,364 |
| Lakewood | 48 Good | 156,583 |
| Thornton | 49 Good | 144,187 |
| Grand Junction | 46 Good | 140,777 |
| Greeley | 52 Moderate | 139,842 |
| Arvada | 48 Good | 122,634 |
| Pueblo | 45 Good | 121,976 |
| Boulder | 48 Good | 120,289 |
| Parker | 46 Good | 61,783 |
| Durango | 48 Good | 19,411 |
| Alamosa | 25 Good | 9,879 |
| Air Force Academy | 46 Good | 6,727 |
| Vail | No EPA monitor | 4,613 |
| Buena Vista | 48 Good | 3,010 |
| Frisco | No EPA monitor | 2,825 |
| Palmer Lake | 46 Good | 2,623 |
| Palisade | 46 Good | 2,584 |
| Meeker | 46 Good (2024) | 2,580 |
| Telluride | 36 Good | 2,160 |
| Paonia | 29 Good | 1,661 |
| Cascade-Chipita Park | 46 Good | 1,412 |
| Dolores | 45 Good | 918 |
| Calhan | 46 Good | 620 |
| Loghill Village | No EPA monitor | 618 |
| Nucla | No EPA monitor | 598 |
| Sugarloaf | 48 Good | 474 |
| Copper Mountain | No EPA monitor | 353 |
| Ophir | 36 Good | 120 |
| Fulford | No EPA monitor | 0 |
Our dataset lists 477 places in Colorado; the 32 above have a page. For a smaller town, the nearest city above is the closest match.