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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