A global overview of national regulations and standards for drinking-water quality

This report from the WHO summarizes information from 104 countries and territories on values specified in national drinking-water quality standards for aesthetic, chemical, microbiological and radiological parameters. The aim of the report is to enable regulators and other key stakeholders to access and compare data when setting or revising national drinking-water quality standards, although comparison should be approached with caution. The report is not intended to provide guidance on selecting appropriate parameters and parameter limits for drinking-water quality standards. The separate publication, Developing Drinking-water Quality Regulations and Standards (WHO, in press) should be consulted for such guidance. Which is also available on the humanitarian library: