Links:
[1] http://admin.indiaenvironmentportal.org.in/news/special-initiative-needed-safe-drinking-water-kalam
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-chennai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water-standards
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-quality