X  Close Official AQ sensor station - Rockville, Maryland, USA

  PM2.5 PM10 O3 AQI classification       
Current 17 23.3 23.3 Good Air Quality
     
Forecastmin avg maxmin avg maxmin avg max           
03-05-202662769921304799Moderate Air Quality 
    
03-06-202626619210223692Moderate Air Quality 
    
03-07-20262031567122256Moderate Air Quality 
    
03-08-20266142036720Good Air Quality
     
03-09-20262138517131751Moderate Air Quality 
    
03-10-20262850114101744114Unhealthy for some  
   
03-11-2026834493101349Good 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: 03-07-2026 1:00 am