Residents of the city may have benefited from better access to groundwater, but it has also given rise to the threat of arsenic poisoning.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/water-samples-city-test-positive-arsenic
[2] http://admin.indiaenvironmentportal.org.in/category/author/arunavsinha
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-lucknow
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttar-pradesh
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lucknow-t
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/arsenic
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-groundwater-board-cgwb
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bureau-indian-standards-bis-0
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gomti
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects