The standard prescribes the requirements, test methods and sampling procedure for ascertaining the suitability of water for drinking purpose.
Links:
[1] http://admin.indiaenvironmentportal.org.in/reports-documents/drinking-water-standards-10500-2004
[2] http://admin.indiaenvironmentportal.org.in/category/publisher/bureau-indian-standards
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water-standards
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pesticide-residues