What Is Air Quality Index (AQI)?
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2 Nov 2024
The Air Quality Index (AQI) is a numerical scale used to communicate air pollution levels to the public
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Higher AQI values indicate more severe air pollution, which can have serious health impacts on the population
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AQI measurements require specialized monitors that assess pollutant concentrations over specific periods
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Each AQI level is classified with a descriptor, color code, and public health advisory
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Many countries, including the U.S., use an AQI system developed by the Environmental Protection Agency (EPA)
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The AQI values reported at a location are based on the highest pollutant level measured
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India's National Air Quality Index (NAQI) was launched in 2014 to address the country's unique pollution challenges
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India's AQI levels are classified into six categories: Good, Satisfactory, Moderately Polluted, Poor, Very Poor, and Severe
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Different pollutants like PM10, PM2.5, NO2, and CO are measured to calculate the AQI and determine health impacts
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Delhi's PM2.5 levels are among the highest in the world, often exceeding World Health Organization guidelines
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