21 drains of Delhi, one from Uttar Pradesh carry untreated effluent into the river'
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/haryana-takes-yamuna-pollution-issue-delhi
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/yamuna
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biological-oxygen-demand-bod
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-pollution-control-board-cpcb
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/state-pollution-control-board-spcb
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/haryana
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttar-pradesh