A study of the accumulation of microelements in the lake frog Pelophylax ridibundus Pall., 1771 in the heating zones of the cooling ponds of the Beloyarsk NPP and Reftinskaya GRES was carried out. For the entire set of data on the concentrations of elements in frogs, no statistically significant differences were found between the studied water bodies. By the example of both water bodies, the absence of differences in the accumulation of elements by males and females of amphibians was shown. A reliable correlation was established between the concentration of elements in adult frogs with their content in water and plankton. An excess of the maximum permissible concentrations of some elements in the water of both reservoirs, as well as an excess of the concentrations of a number of elements in frogs, compared with background values, are shown.