From ancient times rivers have been a source of pure drinking water and the civilizations flourished around these water bodies.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/will-river-regulation-zone-lifting-kill-ulhas-river
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-news-analysis-mumbai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ulhas
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmentalists
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/common-effluent-treatment-plant-cetp
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources