Due to excessive extraction of groundwater to meet the demands of city dwellers, level of the groundwater in the capital is depleting by two to three metres every year.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/groundwater-level-capital-drops-3m-every-year-experts
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/new-age-bangladesh
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangladesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dhaka
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rivers
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/surface-water
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water