X  Close Official AQ sensor station - North Down Holywood A2, United Kingdom

  PM2.5 PM10 O3 AQI classification       
Current 21 10 22.8 22.8 Good Air Quality
     
Forecastmin avg maxmin avg maxmin avg max           
26-10-202661525371210141525Good Air Quality
     
27-10-20266101847913141518Good Air Quality
     
28-10-2026112123610145101423Good Air Quality
     
29-10-202611172668123101526Good Air Quality
     
30-10-2026182123910129121523Good Air Quality
     
31-10-202623232310101099923Good 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: 26-10-2026 22:00