The waste material dredged out from Hussainsagar and dumped at the abandoned stone quarries in Gajularamaram have been found to be toxic and a serious health hazard.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/hussainsagars-dredged-waste-toxic-poses-health-risks-pollution-control-board
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-hyderabad
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hazardous-waste
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hussain-sagar
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/toxic-wastes
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/andhra-pradesh
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/state-pollution-control-board-spcb-0
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hyderabad-d
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-disposal
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mercury
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/arsenic
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment