X  Close Official AQ sensor station - Howard County Near Road, Maryland, USA

  PM2.5 PM10 O3 AQI classification       
Current 17 17 Good Air Quality
     
Forecastmin avg maxmin avg maxmin avg max           
22-09-2026182442671242Good Air Quality
     
23-09-2026101727471027Good Air Quality
     
24-09-2026142643591343Good Air Quality
     
25-09-20261931436101343Good Air Quality
     
26-09-2026192635681135Good Air Quality
     
27-09-202614192767927Good Air Quality
     
28-09-202613182457924Good 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: 24-09-2026 05:00