![]() ![]() Its air quality index values are typically grouped into ranges. Air pollutants vary in potency, and the function used to convert from air pollutant concentration to AQI varies by pollutant. Health effects corresponding to a given dose are established by epidemiological research. Taken together, concentration and time represent the dose of the air pollutant. ![]() Overview An air quality measurement station in Edinburgh, ScotlandĬomputation of the AQI requires an air pollutant concentration over a specified averaging period, obtained from an air monitor or model. Some of these are Canada's Air Quality Health Index, Malaysia's Air Pollution Index, and Singapore's Pollutant Standards Index. ĭifferent countries have their own air quality indices, corresponding to different national air quality standards. When wildfires result in a high AQI, the use of masks such as N95 respirators outdoors and air purifiers incorporating HEPA filters indoors are also encouraged. When the AQI is high, governmental bodies generally encourage people to reduce physical activity outdoors, or even avoid going out altogether. Children, the elderly and individuals with respiratory or cardiovascular problems are typically the first groups affected by poor air quality. As air pollution levels rise, so does the AQI, along with the associated public health risk. An air quality index ( AQI) is an indicator developed by government agencies to communicate to the public how polluted the air currently is or how polluted it is forecast to become. ![]()
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