Revision of the WHO guidelines for drinking water quality

This paper describes the activity of the World Health Organization in the field of drinking water quality, particularly the revision of the Guidelines for drinking water quality published in 1984. This process will be completed with the publication of new guidelines in 1993. The paper reports the physical, chemical and biological agents considered in the revision process, the procedure used to define the new guidelines, their meaning and their relationships with statutory limits.

Published by Annali dell'Istituto superiore di sanita, 1993. The guideline itself is at the source linked here.

pubmed.ncbi.nlm.nih.gov/8279725/