West Bengal Pollution Control Board

Air Quality Information System

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Detailed day-and-night report for 2011 and 2012
Air Quality Of Kolkata - Day & Night April 2012
Air Quality Of Kolkata - Day & Night May 2012
Air Quality Of Kolkata - Day & Night June 2012
Air Quality Of Kolkata - Day & Night July 2012
Air Quality Of Kolkata - Day & Night August 2012
Air Quality Of Kolkata - Day & Night September 2012
Air Quality Of Kolkata - Day & Night October 2012
Air Quality Of Kolkata - Day & Night November 2012
Air Quality Of Kolkata - Day & Night December 2012