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Air Quality Index

Topics Covered: Conservation related issues.

Air Quality Index:


Context:

Delhi’s air quality has entered the ‘poor’ zone on the Central Pollution Control Board’s air quality index — the first time since June 28.

What is the National Air Quality Index?

Launched in 2014 with outline ‘One Number – One Color -One Description’ for the common man to judge the air quality within his vicinity.

  • The measurement of air quality is based on eight pollutants, namely: Particulate Matter (PM10), Particulate Matter (PM2.5), Nitrogen Dioxide (NO2), Sulphur Dioxide (SO2), Carbon Monoxide (CO), Ozone (O3), Ammonia (NH3), and Lead (Pb).
  • AQI has six categories of air quality. These are: Good, Satisfactory, Moderately Polluted, Poor, Very Poor and Severe.
  • It has been developed by the CPCB in consultation with IIT-Kanpur and an expert group comprising medical and air-quality professionals.

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Sources: the Hindu.