Transcription of Guidelines for drinking-water quality - WHO
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CONTENTSiWorld Health OrganizationGeneva1997 Guidelines fordrinking- water qualitySECOND EDITIONV olume 3 Surveillance and controlof community suppliesGUIDELINES FOR drinking - water QUALITYiiWHO Library Cataloguing in Publication DataGuidelines for drinking - water quality . 2nd : v. 3. Surveillance and control of community supplies1. drinking water standards 2. Data collection methods 3. Guidelines 4. Developingcountries I. Title: Surveillance and control of community suppliesISBN 92 4 154503 8 (v. 3) (NLM Classification: WA 657)The World Health Organization welcomes requests for permission to reproduce or translate its publica-tions, in part or in full.
GUIDELINES FOR DRINKING-WATER QUALITY vi 6.2.1 Catchment protection 85 6.2.2 Groundwater protection 89 6.3 Wells 92 6.3.1 Dug wells 92 6.3.2 Hand-pumped and mechanically pumped
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