The highest AQ index in Colorado (as of 3:00 MST) is currently the Grand Junction area. Particle Pollution (PM2.5) is measuring at 42 (Good). This means air quality is satisfactory, and air pollution poses little or no risk.
Over the next few days, the highest Ozone (OZONE) will be in the Rocky Mountain National Park area. It is forecasted to be Good, meaning air quality is satisfactory, and air pollution poses little or no risk.
| Range | 0 - 50 | 51 - 100 | 101 - 150 | 151 - 200 | 201 - 300 | 301 - 500 |
| Color | ||||||
| Category | Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
Last Updated 13 minutes ago
Below is a list of counties in Colorado. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.