X  Close Official AQ sensor station - Ruby St, Ellensburg, Washington, USA

  PM2.5 PM10 O3 AQI classification       
Current 21 21 Good Air Quality
     
Forecastmin avg maxmin avg maxmin avg max           
10-26-2026820354112435Good Air Quality
     
10-27-2026471023310Good Air Quality
     
10-28-20263692369Good Air Quality
     
10-29-2026717293162929Good Air Quality
     
10-30-2026816296122829Good Air Quality
     
10-31-202613222711172227Good Air Quality
     
11-01-2026101521571221Good Air Quality
     
11-02-20261624298102429Good 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: 10-28-2026 21:00