Guidelines for Drinking-Water Quality, 2nd edition
The 2nd edition of the guidelines is made available on this site in pdf format
Vol. 1 - Recommendations
WHO, Geneva, 1993.
ISBN 92 4 154460
Volume 1 contains the guideline values themselves together with an explanation of how they should be used, the criteria used in selecting the various contaminants considered, a description of the approaches used to derive the guideline values, and brief summary statements supporting the values recommended or explaining why no health-based guideline value is necessary at present.