X  Close Official AQ sensor station - Horicon, Wisconsin, USA

  PM2.5 PM10 O3 AQI classification       
Current 56 19 27.5 56 Moderate Air Quality  
    
Forecastmin avg maxmin avg maxmin avg max           
07-26-20262838467101246Good Air Quality
     
07-27-20262339586101758Moderate Air Quality 
    
07-28-2026233048781148Good Air Quality
     
07-29-20261532565101756Moderate Air Quality 
    
07-30-20262662718202471Moderate Air Quality 
    
07-31-202660677318212473Moderate Air Quality 
    
08-01-20263352669131866Moderate 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: 07-28-2026 4:00 am