Unhealthy Air Quality Alert for Denver-Boulder, CO: PM10 Levels Reach 185
On February 26, 2026, air quality in the Denver-Boulder area reached Unhealthy levels, with PM10 recorded at an AQI of 185.
Current Air Quality
On February 26, 2026, the Denver-Boulder, CO reporting area recorded an Air Quality Index (AQI) of 185, placing the region in the Unhealthy category. The primary pollutant of concern is PM10. Other pollutants measured in the area include Ozone (O3) with an AQI of 51 (Moderate) and Fine Particulate Matter (PM2.5) with an AQI of 58 (Moderate).
What This Means
An AQI in the ‘Unhealthy’ range (151-200) indicates that the air quality is reaching levels where the general public may begin to experience health effects. Members of sensitive groups are likely to experience more serious health effects than the general population.
Who Should Take Precautions
While the entire population may be affected, the following groups are at higher risk and should take specific precautions:
- People with heart or lung disease
- Older adults
- Children and teenagers
What You Should Do
To reduce exposure and protect your health, the following guidance is recommended:
- For sensitive groups: Avoid prolonged or heavy exertion. Consider moving activities indoors or rescheduling them to a time when air quality is better.
- For everyone else: Reduce prolonged or heavy exertion. Take more breaks during outdoor activities and limit intense physical labor.
Source
This data is provided by the EPA AirNow service.
Source: EPA Official Notice