The results of field, chemical analytical and numerical studies of aerosol deposition of inorganic components in snowpack in the environ of Novosibirsk thermal power plant (TPP) No 5 in winter season of 2018/19 are presented. The snowpack sampling was made in the mainstream winter wind rose directions at the distances of 1.0 - 20.0 km. After melting, the samples were analyzed by the methods of atomic absorption, atomic emission, capillary electrophoresis, pH-, conductivity and gravimetry measurements. It was shown that there is the concentration decreasing with the distance from the source for the following parameters as sediment, the content of main macro- and some microelements in a whole. In order to identify the impurity belonging to a joint source, there was done the microelement statistical correlations. The numerical analysis of snow cover contamination monitoring data on the basis of reconstruction model of weakly settling impurities is presented and discussed.