Three years [2011 to 2013] comparison of noise levels during Diwali Festival 2013 by Maharashtra Pollution Control Board.
Links:
[1] http://admin.indiaenvironmentportal.org.in/data-statistics/three-years-2011-2013-comparison-noise-levels-during-diwali-festival-2013
[2] http://admin.indiaenvironmentportal.org.in/category/publisher/maharashtra-pollution-control-board
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/noise-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/festival
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/statistics