This paper reports results of determination of arsenic, antimony and selenium inorganic species in samples of surface water from the lakes of the Pszczewski Landscape Park located in western Poland. Concentrations of total arsenic, antimony and selenium, determined by atomic absorption spectrometry with generation of hydrides, were up to 0.66 ng/ml, 0.62 ng/ml and 0.76 ng/ml, respectively, at respective detectability limits of 0.04 ng/ml, 0.04 ng/ml and 0.03 ng/ml. For arsenic and antimony the concentrations of the two species determined (As(III)/As(V) and Sb(III)/Sb(V)) were similar, while for selenium the Se(IV) species was dominant.