The only official document on the ‘known health impact’ of fireworks is a compilation of findings of surveys, put together by Central Pollution Control Board.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/simply-put-how-firecrackers-work-impact-your-health
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diwali
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/festival
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment-pollution-control-authority-epca
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/supreme-court
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-pollution-control-board-cpcb
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/centre-science-and-environment-cse