The research of a chemical composition of water in Olkha mineral springs (Shelekhov district in Irkutsk area) carried out, physical and chemical properties of soils are studied. It is revealed, that water has hydricarboncloride calcium-magnesian-natrium or hydricarbon-cloride calcium-natrium-magnesian composition. The salt content not exceeded 1,52 g/l. Near of the springs meadow, marsh and meadow-marsh soils are prevailing. These soils have рН from light alkaline down to neutral. On the salinisation degree studied soils are poorly-salty. The chemical composition in soils corresponds to the same in springs water.