World Library  
Flag as Inappropriate
Email this Article

Raw water

Article Id: WHEBN0027503448
Reproduction Date:

Title: Raw water  
Author: World Heritage Encyclopedia
Language: English
Subject: Water supply network, Boiler water, Jardine Water Purification Plant, China Water Affairs Group, Economy of Puerto Rico
Collection: Liquid Water
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Raw water

Longham Lake was previously a gravel pit; it's now used as a reservoir to hold raw water for subsequent treatment and human use.

Raw water is natural water found in the environment, such as rainwater, ground water, and water from bodies like lakes and rivers. Water in this form is considered raw, as opposed to water which has been treated before consumption, such as drinking water or water which has been used in an industrial process, such as waste water. Millions of people in developing countries rely on untreated raw water for their water supply, sometimes purifying it by boiling.[1]

Raw water flushing is a system for water conservation.

Contents

  • Composition 1
  • See also 2
  • References 3
  • Additional sources 4

Composition

The composition of raw water is naturally variable but commonly contains one or more of the following significant contaminants in the form of dissolved ions, particles and living organisms:[2]

  • Humic acid and other complex acids resulting from plant decay. These occur in peat and soil and are significant in discolouring the water.
  • Minerals which make water hard. Most common are carbonates of calcium and magnesium.
  • Particles of clay and silt.
  • Microorganisms such as bacteria, viruses, protozoa and their cysts.
  • Dissolved air molecules, especially oxygen
  • Salt, which makes water brackish, having more salinity than fresh water, but not as much as seawater.

See also

References

  1. ^ Huq, A; et al. (July 1996). "A simple filtration method to remove plankton-associated Vibrio cholerae in raw water supplies in developing countries". Vol. 62, No. 7. Applied and Environmental Microbiology. pp. 2508–2512. Retrieved June 7, 2012. 
  2. ^ Safe Drinking Water Committee (1980), "Raw water quality", Drinking Water and Health 2, National Academies, pp. 7 et seq. 

Additional sources

  • Clark, J. A.; et al. (1982). "Characterization of indicator bacteria in municipal raw water, drinking water, and new main water samples". 28 (9). Canadian Journal of Microbiology. pp. 1002–1013. Retrieved June 6, 2012. 
  • LeChevallier, M W: et al. (November 1980). "Enumeration and characterization of standard plate count bacteria in chlorinated and raw water supplies". Vol. 40, No. 5. Applied and Environmental Microbiology. pp. 922–930. Retrieved June 7, 2012. 


This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.