The arsenic affected areas of West Bengal are lying on a sediment of Younger Deltaic Deposition (YDD). The same sediment extends eastwards towards Bangladesh, covering the approximate area of 34 districts out of a total of 64 districts in Bangladesh. We suspect that the groundwater of these 34 districts of Bangladesh may be arsenic contaminated.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/groundwater-arsenic-calamity-bangladesh
[2] http://admin.indiaenvironmentportal.org.in/category/author/gautam-samanta-et-al
[3] http://admin.indiaenvironmentportal.org.in/category/author/ratan-krdhar
[4] http://admin.indiaenvironmentportal.org.in/category/author/bhajan-kr-biswas
[5] http://admin.indiaenvironmentportal.org.in/category/journal/current-science
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangladesh
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater-quality
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/arsenic
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/west-bengal
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water