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

  PM2.5 PM10 O3 AQI classification       
Current 42 44.8 44.8 Good Air Quality

Forecastmin avg maxmin avg maxmin avg max           
07-22-202110213836113112038Good Air Quality
07-23-202115304758122132247Good Air Quality
07-24-2021293953710142142353Moderate Air Quality 
07-25-20213850561013162102256Moderate Air Quality 
07-26-2021204657612162132457Moderate Air Quality 
07-27-2021315063813182142863Moderate Air Quality 
07-28-2021255467615201162967Moderate 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 warnings of emergency conditions. The entire population is more likely to be affected
Hazardous Air Quality > 300 Health alert: everyone may experience more serious health effects
 More information:  EPA Air Quality Index      Sensor data captured at: 07-24-2021 2:00 pm