Transcription of Guidelines for Drinking-water Quality
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Guidelines for Drinking-water Quality
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 2011 All 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 ( ).The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the World Health Organization concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.)
v CONTENTS 4.3.6 Quality assurance and quality control 68 4.3.7 Verification of water safety plans 69 4.4 Management procedures for piped distribution systems 69
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