WHO publishes its drinking-water quality guidelines with a third addendum

The World Health Organization published the latest version of its Guidelines for drinking-water quality on 17 June 2026: the fourth edition, now incorporating the first, second and third addenda.

The guidelines are WHO's international reference on the safety of drinking water. In India, drinking water is specified by IS 10500, which our article on the IS 10500 drinking water standard walks through.