Guidelines for Drinking-water Quality

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Guidelines for Drinking-water QualityFOURTH EDITION WHO Library Cataloguing-in-Publication DataGuidelines for Drinking-water Quality - 4th ed. water - standards. - standards. Quality - standards. Health 978 92 4 154815 1 (NLM classification: WA 675) World Health Organization 2011All rights reserved. Publications of the World Health Organization are available on the WHO web site ( ) or can be purchased from WHO Press, World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland (tel.: +41 22 791 3264; fax: +41 22 791 4857; e-mail: Requests for permission to reproduce or translate WHO publications whether for sale or for non- commercial distribution should be addressed to WHO Press through the WHO web site ( ).)

iv GUIDELINES FOR DRINKING-WATER QUALITY 2.3 Surveillance 25 2.4 Verification of drinking-water quality 25 2.4.1 Microbial water quality 26

  Guidelines, Quality, Water, Drinking, Guidelines for drinking water quality