The territory of Hong Kong can be broadly classified as industrial, urban and new development zones according to the major land use in the most populated areas of the zone.
Air Pollution IndexM.M YEUNG AND S.W. PANG
Not too long ago, most people in Hong Kong had never heard of an air pollution index. Some might have heard or seen the report of such an index but only when they were travelling or living in foreign cities. Recently, a survey done by the Social Research Centre of the University of Hong Kong found that almost everyone in Hong Kong knows that an air pollution index is published daily by the Environmental Protection Department. About 60% of the people consider that the index is useful to them.
The first air pollution index was published in Hong Kong by the Environmental Protection
Department on 6 June 1995. Since then, an index has been released everyday at 4:00 p.m.,
except on Sundays and holidays, and reported by television, radio and most of the newspapers.
People can also find out the index by calling 2827 8541. Very quickly, listening to the broadcast
of the air pollution index has become part of the normal life of many people.
The system transforms all air pollution measurement data into a number between 0 and 500. An index value between 0 and 50 means that the air quality is good. An index value between 50 and 100 means that the air is moderately polluted. When the index value is over 100, one or more air pollutants have already breached the limit allowed in Hong Kong air quality objectives. People more susceptible to air pollution, such as those who have heart or respiratory diseases, are advised to reduce physical exertion and outdoor activities as far as possible. When the index value is over 200, which have not occurred in Hong Kong since the system was launched in June 1995, the air pollution will be so high that all people are advised to reduce physical exertion and outdoor activities as far as possible.
To serve the community better, we will expand the network by adding a monitoring station in the Eastern District. Additionally we will add two roadside monitoring stations to the network, to assess the pollution levels on busy road. Subsequently a record index representing the air quality in busy streets will be introduced.
Which months have good air quality conditions?