[
API and You
Air Pollution Index and Air Quality
What action
should I take? 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. If you are a smoker,
you should quit smoking now!
Air Pollution Level
API
Advice to Public
General API
Roadside API
Severe
aa
aa
aa
aa
aa
aa201-500
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
aa26-50
No response action is required.
Low
aa
aa
aa
aa
aa
aa 0-25
No response action is required.
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