National Air Quality Indices Has Been Released (Download PDF)


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The National Air Quality Indices (AQI) has been released by the Central Pollution Control Board (CPCB) for 24 cities across India in the month of January 2016. Delhi is also termed as most polluted city in world by the World Health Organization (WHO).

Key facts

  • Varanasi (Uttar Pradesh) and Muzzafarpur (Bihar) has topped the list with an AQI value of 409 points each. So that they are coded as ‘severe’ in terms of air pollution in January 2016.
  • Faridabad (Haryana) has sported 3rd place with 399 points.
  • Patna (Bihar) has sported 4th position with 388 points and
  • Agra (Uttar Pradesh) has placed at 5th position with 372 points.
  • Delhi has placed at the 6th position with 362 points and was coded as ‘very poor’ in terms of air pollution. (Previously it was coded as ‘Poor’ with 293 points in December 2015)
  • In September 2015 and October 2015 Delhi was at the top in the list of AQI in terms of air pollution chart.

About National Air Quality Index:

CPCB published the National AQI every month with a numerical value and a color code.

This report helps in comparing air pollution levels in cities.

It is examine based on following 8 pollutants:

  • Particulate Matter (PM 2.5, PM 10)
  • sulphur dioxide (SO2)
  • nitrogen dioxide (NO2)
  • carbon monoxide (CO)
  • ozone (O3)
  • ammonia (NH3)
  • Lead (Pb)

The colors are classified into 6 categories according to numerical value as follow:

  • Good (0 - 50)
  • Satisfactory (51 - 100)
  • Moderately polluted (101 - 200)
  • Poor (201 - 300)
  • Very poor (301 - 400)
  • Severe (401 - 500)

- Published/Last Modified on: February 9, 2016

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