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

  PM2.5 PM10 O3 AQI classification       
Current 53 36 14 53 Moderate Air Quality  
    
Forecastmin avg maxmin avg maxmin avg max           
06-30-202625455612213156Moderate Air Quality 
    
07-01-202625516110233161Moderate Air Quality 
    
07-02-202638516314213163Moderate Air Quality 
    
07-03-202644698817375488Moderate Air Quality 
    
07-04-202656627325283673Moderate Air Quality 
    
07-05-202650648818294988Moderate Air Quality 
    
07-06-202652759021374890Moderate Air Quality 
    
07-07-202662769929385699Moderate 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: 07-02-2026 11:00 am