Report on the activity of the "Natural Mineral Water Working Committee" of the FAO/WHO Codex Alimentarius Hungarian National Committee. The working committee has been functioning since 1972. The European Regional Standard (108-1981) was perpared in 1981. On its 19 Session the Codex Alimentarius Commission adopted a resolution according to which - with regard to the importance of mineral waters - the European Standard had to be redrafted to a world standard and an other standard had to be elaborated for the packaged (bottled) waters other than natural mineral waters as well. The new standard prepared in Thun Switzerland in 1996 and it was adopted on the 22 Session of the C.A.C. The elaboration of the world standard for packaged (bottled) waters other than mineral waters started in Bern, in 1998