The highest AQ index in Colorado (as of 14:00 MDT) is currently the Denver-Boulder area. Ozone (OZONE) is measuring at 122 (Unhealthy for Sensitive Groups). This means members of sensitive groups may experience health effects. The general public is less likely to be affected.
Over the next few days, the highest Ozone (OZONE) will be in the Rocky Mountain National Park area. It is forecasted to be Moderate, meaning air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
| 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 5 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.