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

  PM2.5 PM10 O3 AQI classification       
Current 21 34.4 34.4 Good Air Quality

Forecastmin avg maxmin avg maxmin avg max           
05-12-20213101514612253636Good Air Quality
05-13-2021513182576174141Good Air Quality
05-14-202182757310201144457Moderate Air Quality 
05-15-2021133760412201145160Moderate Air Quality 
05-16-2021134567413223204867Moderate Air Quality 
05-17-2021304557712178173357Moderate Air Quality 
05-18-2021253754710166235054Moderate 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: 05-14-2021 7:00 pm