X  Close Official AQ sensor station - Athens, Boulder-CU, Colorado, USA

  PM2.5 PM10 O3 AQI classification       
Current 17 32 14 32 Good Air Quality
     
Forecastmin avg maxmin avg maxmin avg max           
07-08-20261835657143065Moderate Air Quality 
    
07-09-2026181924781024Good Air Quality
     
07-10-2026172228791228Good Air Quality
     
07-11-20262328408111440Good Air Quality
     
07-12-202624293811121538Good Air Quality
     
07-13-20261826477111647Good Air Quality
     
07-14-2026162234681234Good Air Quality
     
07-15-2026202452781652Moderate Air Quality 
    
            

classification AQI The health effects should be based on 24 hours average values only.
Good Air Quality 0-50 Air quality is considered satisfactory, and air pollution poses little or no risk
Moderate Air Quality 50-100 Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
Unhealthy for some 100-150 Members of sensitive groups may experience health effects. The general public is not likely to be affected.
Unhealthy Air Quality 150-200 Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
Very Unhealthy 200-300 Health alert: everyone may experience more serious health effects
Hazardous Air Quality > 300 Health warnings of emergency conditions. The entire population is more likely to be affected
 More information:  EPA Air Quality Index      Sensor data captured at: 07-10-2026 4:00 pm