1. American Public Health Association (1998). Standard methods for the examination of water and waste water. Washington, DC: American Public Health Association.
2. Bureau of Indian Standards (1991). Indian standard specification for drinking water. IS 10500, New Delhi, India
3. Chakrapani, G. J. (2005). Major and trace element geochemistry in upper Ganga River in the Himalayas, India. Environmental Geology, 48(22), 189–201. doi: 10.1007/s00254-005-1287-1 .
4. De, A. K. (2002). Environmental chemistry (4th edn., p. 232). New Delhi, India: New Age International.
5. Department of Environment (2001). Department of Environment, Government of Tamilnadu, India. Retrived March 19, 2009 from http://www.tnenvis.nic.in/DtProfiles/trichy .