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

  PM2.5 PM10 O3 AQI classification       
Current 16 9 20 20 Good Air Quality
     
Forecastmin avg maxmin avg maxmin avg max           
09-18-202617182255622Good Air Quality
     
09-19-202612172134521Good Air Quality
     
09-20-20269141834518Good Air Quality
     
09-21-20266892339Good Air Quality
     
09-22-2026691223412Good Air Quality
     
09-23-20268213336933Good Air Quality
     
09-24-20263036448101144Good 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: 09-20-2026 3:00 am