Water Sanitation and Health
Our vision and mission are the attainment by all peoples of the lowest possible burden of water and sanitation-related disease through primary prevention.
Hardness
Hardness is considered in the WHO Guidelines for Drinking-water Quality (GDWQ).
For individual chemicals, the GDWQ also consider:
Previous editions of the background document
For the 1996 background document, see Guidelines for drinking-water quality, 2nd ed. Vol. 2 (1996)
Chemical hazards in drinking water
Other publications of interest

30 March 2009
Calcium and magnesium in drinking-water
The meeting report is on the role and possible health benefits of calcium and magnesium in drinking-water, and includes the following sections:global dietary...

This book provides guidance on the chemical safety of drinking-water. Chemical contaminants of drinking-water are often considered a lower priority than...

Protecting groundwater for health provides a structured approach to analysing hazards to groundwater quality, assessing the risk they may cause for a specific...