Bellandur lake, which has dirty foam flowing through it, is one of the most polluted lakes in the City.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/only-four-105-lakes-city-good-says-iiscs-latest-study
[2] http://admin.indiaenvironmentportal.org.in/category/author/bosky-khanna
[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/lake-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangalore-t
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-institute-science-iisc
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangalore
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution