ABSTRACT: Anthropogenic influences on six gravel pits and one pond according to the content of dominant ions, TDS, COD, oxygen and trace elements were assessed since 1976. For the comparison the water in the river Dunaj was evaluated, too. Anthropogenic influence are manifested primarily by increased concentrations of sulfates (Draždiak, Štrkovec, Pasienky, Zlaté Piesky, Vajnory) and of chlorides (Vajnory). In the period 1994 1997 in comparison with the period 1987 1988 the content of sulfates decreased (Štrkovec, Pasienky). The increased concentrations of oxygen which are observed in the gravel pits are the results of water plants assimilation (Štrkovec). The most problematic trace elements are mercury with the highest concentration in Draždiak, Zlaté piesky and Vajnory and vanadium with the highest concentration in Draždiak, Vajnory and Zlaté piesky.