Question raised in Lok Sabha on List of Most Polluted Cities, 22/11/2016. The methodology for calculation of pollution index in various parts of world is not same. Cities can be ranked on the basis of different criteria pollutants with different results. An ambient air pollution database released by the World Health Organisation in May 2016

Question raised in Lok Sabha on Air Pollution, 22/11/2016. The air pollution in National Capital Region (NCR) reached severe category in Air Quality Index (AQI) recently during the first week of November, 2016.

Question raised in Rajya Sabha on Air pollution in Delhi, 21/11/2016. The ambient air quality data monitored by Central Pollution Control Board at six locations in Delhi, under National Air Quality Monitoring Programme (NAMP), during October 2016 is annexed. The data reveals that, SO2 and NO2 are within National Ambient Air Quality Standard (NAAQS) of 80µg/m3 (24 hourly standards for SO2 and NO2) at all six locations in Delhi during October 2016.