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

  PM2.5 PM10 O3 AQI classification       
Current 9 21 21 Good Air Quality
     
Forecastmin avg maxmin avg maxmin avg max           
27-02-2026182944691244Good Air Quality
     
28-02-20262143857132885Moderate Air Quality 
    
01-03-20262837231037Good Air Quality
     
02-03-20267152635726Good Air Quality
     
03-03-2026103456391656Moderate Air Quality 
    
04-03-20261752635141963Moderate Air Quality 
    
05-03-20266298151183453151Unhealthy Air Quality   
  
06-03-2026383413934Good 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: 01-03-2026 17:00