This paper reports on concentrations of heavy metals (Cd, Cr, Cu, Fe, Hg, Ni, Pb, V, and Zn) in mosses (Pleurozium schreberi, Hylocomium splendens and Dicranum scoparium) and cover humus from Slovak area on a 16 x 16 km pan-European grid. Average heavy metal concentration in all mosses species is (in mg. kg-1): 1.3 ± 0.5 Cd, 17 ± 15 Cr, 21 ± 20 Cu, 2459 ± 2735 Fe, 0.2 ± 0.7 Hg, 4.3 ± 5.2 Ni, 31 ± 25 Pb, and 1.9 ± 3.5 V and 62 ± 37 Zn. Average heavy metal concentration in cover humus is (in mg. kg-1): 1.1 ± 0.5 Cd, 28 ± 35 Cr, 20 ± 10 Cu, 11 825 ± 6251 Fe, 0.4 ± 1.5 Hg, 21 ± 11.5 Ni, 61 ± 45 Pb, 10.5 ± 7.8 V and 108 ± 56 Zn. The content of Cu, Fe, Ni, in al mosses species represented an increase and the content of Cd, Pb, Zn represented a decrease in comparison with 1991/1995.