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API and You

Air Pollution Index and Air Quality

What action should I take?

The suggested precautionary actions are summarised below:

Air Pollution Level API Advice to Public
General API Roadside API
Severe aa
aa
aa
aa
aa
aa
201-500 The general public are advised to reduce physical exertion and outdoor activities The general public are advised to avoid prolonged stay in areas with heavy traffic. If it is necessary to stay in streets or roads with heavy traffic, they are advised to reduce physical exertion as far as possible.
Very High aa
aa
aa
aa
aa
aa
101-200 Persons with existing heart or respiratory illnesses (such as coronary heart and cardiovascular diseases, asthma, chronic bronchitis and chronic obstructive airways diseases) are advised to reduce physical exertion and outdoor activities. Persons with existing heart or respiratory illnesses (such as coronary heart and cardiovascular diseases, asthma, chronic bronchitis and chronic obstructive airways diseases) are advised to avoid prolonged stay in areas with heavy traffic. If it is necessary to stay in streets or roads with heavy traffic, they are advised to reduce physical exertion as far as possible.
High aa
aa
aa
aa
aa
aa
51-100 No immediate response action is suggested -- Long-term effects may, however, be observed if exposed at this level persistently for months or years
Medium  aa
aa
aa
aa
aa
aa
26-50 No response action is required.
Low  aa
aa
aa
aa
aa
aa
0-25 No response action is required.

As the health effects on individuals may vary, you should seek advice from a medical doctor if you are in doubt or feel uncomfortable. If you are a smoker, you should quit smoking now!

     
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Last revision date: 5 December 2006