Summary: Distribution of loess and loesslike breeds and main factors of forming of минерализации of subsoil and superficial waters of Uzbekistan ar lighted up in the article. The processes of dissolution, lixiviating, are examined. Geological processes and phenomena, co-operation of geological and water environment of yavlyayuscheyasya by the main factors of forming of mineralizacii and chemical composition of waters.

Key words: Salinity, leaching, dissolution, aggressiveness, underground water, anions, chemistry, highly soluble salts.