EN
In this paper are presented the results of measurements determiny tin concentrations in the muscles, livers, kidneys and lungs taken from 15 cows from the voivodeship of Białystok, where small levels of environmental pollution with heavy metals were recorded and from 15 cows of the Katowice region, where significant environmental pollution with these metals were noted. The averages of these concentrations ranged: 0.025-0.040 µg/g per sample and were not dependent on the kind of sample or region. Tin concentrations in the examined organs and muscles within determined limits were not toxicologically dangerous for consumers.