Mr G.R. Borthakur the deputy chief chemist of the Directorate of Geology and Mining, said the directorate, along with the Central Ground Water Board, had undertaken a survey in Karbi Anglong district
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[1] http://admin.indiaenvironmentportal.org.in/news/fluoride-content-water-concerns-experts
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/sentinel-guwahati
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health