More than a lakh litre of sewage and waste water flow into the Upper Lake every day.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/toxic-taal-upper-lake-sewage-dumping-ground
[2] http://admin.indiaenvironmentportal.org.in/category/author/rageshri-ganguly
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-bhopal
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/madhya-pradesh
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bhopal-d
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lake-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sewage-pollution
[8] http://admin.indiaenvironmentportal.org.in/thesaurus/national-green-tribunal-ngt
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sehore-d
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/land-encroachments
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/toxic-wastes
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution