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

  PM2.5 PM10 O3 AQI classification       
Current 18 8 23.8 23.8 Good Air Quality
     
Forecastmin avg maxmin avg maxmin avg max           
27-04-20261639565121756Moderate Air Quality 
    
28-04-2026692734727Good Air Quality
     
29-04-2026491634516Good Air Quality
     
30-04-20268122535725Good Air Quality
     
01-05-2026571234512Good Air Quality
     
02-05-20268132256922Good Air Quality
     
03-05-20261725467121946Good 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 warnings of emergency conditions. The entire population is more likely to be affected
Hazardous Air Quality > 300 Health alert: everyone may experience more serious health effects
 More information:  EPA Air Quality Index      Sensor data captured at: 29-04-2026 01:00