X  Close Official AQ sensor station - Lewiston, Maine, USA

  PM2.5 PM10 O3 AQI classification       
Current 21 10 21 Good Air Quality
     
Forecastmin avg maxmin avg maxmin avg max           
14-04-202641424310101143Good Air Quality
     
15-04-20261936536101553Moderate Air Quality 
    
16-04-20263844549111554Moderate Air Quality 
    
17-04-20262339527101352Moderate Air Quality 
    
18-04-20262839517101351Moderate Air Quality 
    
19-04-202632753171453Moderate Air Quality 
    
20-04-20262471237Good Air Quality
     
21-04-20265111924619Good 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: 16-04-2026 14:00