The analysis of the samples collected from residential areas and the proximity of the industrial areas of Jiu Valley was carried out by means of induced coupled plasma optical emission spectrometry (ICP-OES) after acid processing and mineralization of the samples. The pollution level has increased once with the industrial development and acceleration of urbanization processes in the human society. Of the pollutant-generating substances, heavy metals are of particular importance. The purpose of this paper is to highlight level of pollution by heavy metals using moss (inferior plants) in order to determine the degree of bioaccumulation. From the pollution point of view, zinc, cadmium and lead are of particular relevance, but the effects of other heavy metals have also been studied. The pollution effects last for a long time in waste dumps, areas polluted with heavy metals from fuel combustion processes, fossil fuels a.s.o. The analysis of the samples collected from residential areas and the proximity of the industrial areas of Jiu Valley was carried out by means of induced coupled plasma optical emission spectrometry (ICP-OES) after acid processing and mineralization of the samples
