The district surveillance unit of the health department had taken note of accumulation of nullah water in the lake of the Kanpur zoo which is a breeding ground for the various bacterial diseases.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/epidemiologist-asked-inspect-kanpur-zoo-study-contamination-water-its-lake
[2] http://admin.indiaenvironmentportal.org.in/category/author/abhinav-malhotra
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-kanpur-0
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttar-pradesh
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kanpur-d
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/zoos
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater-pollution
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/leopard
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/animal-diseases
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects