Alleging that Delhi was emptying its 16 drains into the Yamuna river which was later converging with the Ganga and polluting it, the UP government has issued a notice to Arvind Kejriwal government
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/threatens-cut-water-supply-delhi-over-ganga-pollution
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-lucknow
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttar-pradesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/yamuna
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ganga
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-supply
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agra-t
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mathura-t
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gomti
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution