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

  PM2.5 PM10 O3 AQI classification       
Current 23 10 33.4 33.4 Good Air Quality
     
Forecastmin avg maxmin avg maxmin avg max           
02-02-2026142131571231Good Air Quality
     
02-03-202692031371031Good Air Quality
     
02-04-20262651738162573Moderate Air Quality 
    
02-05-202642546314242963Moderate Air Quality 
    
02-06-202621353152253Moderate Air Quality 
    
02-07-202621332151132Good Air Quality
     
02-08-20262129438121643Good Air Quality
     
02-09-202627476411183064Moderate 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: 02-04-2026 5:00 pm