1. The problem of the vertical hydrochemical zonality of artesian water must be regarded in its association with the hydration of ions in solutions and the peculiarities of the thermal motions of ions and water molecules in solutions. 2. Under the conditions of the slow downward movement of artesian water these peculiarities result in the formation of supplementary streams of particles which are superimposed on the general movement of the artesian water. it can be shown that with these supplementary streams there are associated both increase in mineralization of subterranean waters with increase in depth, and also a regular change from bicarbonatewaters, to sulfate waters, and then to chloride waters.