|Air Pollution Index (API)|
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|Background Information of API
Air pollutants can cause long-term health effects to us. However, air pollution levels sometimes can become so high that they may have more immediate impacts for those with existing heart or respiratory illnesses. The Air Pollution Index is to let you know about the quality of the air at the moment.
The API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Those pollutants are nitrogen dioxide, sulphur dioxide, ozone, carbon monoxide and respirable suspended particulates. APIs for each of these five pollutants are calculated and the highest API number is reported as the API of that hour.
API and Air Quality
The API ranges from 0 to 500 and is divided into 5 bands according to the potential effects on health. The potential health effects for different ranges of API values are as follows.
Points to Note
The suggested precautionary actions are summarised below.
As the health effects on individuals may vary, you should seek advice from a medical doctor if you are in doubt or feel uncomfortable.
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