The mainly purposes this paper to compare the atmospheric air contamination in different localities depending on the winter and summer season of the year, with use of the enrichment factor and the Principal Component Analysis. The lack of a clear correlation between the enriching coefficients of Pb and Cd as well Cr and Ni may indicate that over the town area masses of the air from different directions can displace and as well, some close range sources of contamination can effect it. At present, the ecotoxicological estimations established for particular contaminated areas should include the information of the similarities of metal occurrence on the base of PCA analysis.
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