ABSTRACT: Antimony and arsenic occur only in trace concentration in surface water and groundwater in natural conditions. These toxic elements are strictly limited in drinking water. The limit value for Sb is 0.005 mg.L-1 and for arsenic 0.01 mg.L-1. The results of antimony and arsenic distribution in water in abandoned deposit Dúbrava are introduced in the article. This mining area belongs to significant ore deposits in Slovakia. The mining water from mine adits is the main source of antimony in this locality. The highest content of Sb (9 300 ug.L-1) was detected in the Samuel adit outflow, predominantly as Sb(V). The antimony is attenuated by dilution and adsorption on ferric iron minerals in stream sediments and soils in the Paludžanka brook, with resulting concentration 128 ug.L-1 in the surface water at the north site boundary of mining area. Speciation modelling has been performed using the PHREEQC-2. The positive values of saturation indexes for amorphous Fe(OH)3 and goethit FeO(OH) were calculated.