AMONG THE 144 wards under Kolkata Municipal Corporation (KMC), 100 have significantly higher arsenic contamination in water than the limits deemed safe by the World Health Organisation (WHO).
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/arsenic-contamination-water-alarming-100-kolkata-municipal-corporation-wards
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-expess-kolkata
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/west-bengal
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kolkata
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/arsenic-poisoning
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/municipal-corporation
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater-pollution