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The Air Quality Index
The Air Quality Index (AQI) was developed by the HDMAE in accordance with the method currently used in USA and Europe, with the purpose of providing the public with a facile understanding of the air quality measured in various locations.
The AQI computation is based on continuous measurements of ambient air concentrations of four pollutants in each monitoring site: Ozone, Respirable Particulate Matter, Sulfur Dioxide and Nitrogen Oxides (O3, PM10, SO2, NOx).
Data regarding the ambient air concentrations of the pollutants is collected every half-hour from the monitoring stations and reported as Air Quality Index (AQI), based on the following equation:
AQI = 100 - K*C
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C - |
Pollutant concentration. |
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K - |
Factor, different for each pollutant |
AQI is calculated relatively to the Israeli Standards for each pollutant and according to the methodology developed by HDMAE. AQI figures and colors shown on the map are facilitating the quick recognition whether the air quality in a particular location is rated as Good, Moderate or Poor.
These ratings are based on the highest concentration measured for any one of the above pollutants at each of the monitoring stations. The AQI changes every half-hour based on data received from the stations.
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