The Vrishabhavathi river, a tributary of the Arkavathy river, is a stark example of river pollution.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/poisoning-river-purity
[2] http://admin.indiaenvironmentportal.org.in/category/author/prashanth-g-n
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/deccan-herald-bangalore
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/karnataka
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmentalists
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industrial-waste
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mercury
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health