What is the National Air Quality Index?

The National Air Quality Index is a pollution measurement index that transforms complex air quality data of eight pollutants into a single number (index value), nomenclature and colour.

The National Air Quality Index was launched by 17 October 2014 in order to provide better information on air quality in an easy-to-understand format for the general public.

The measurement of air quality is based on eight pollutants, namely,

  • Particulate Matter (size less than 10 µm)
  • Particulate Matter (size less than 2.5 µm)
  • Nitrogen Dioxide (NO2)
  • Sulphur Dioxide (SO2)
  • Carbon Monoxide (CO)
  • Ozone (O3)
  • Ammonia (NH3)
  • Lead (Pb)

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