This work was undertaken to identify the presence of pathogenics and quality deteriorating microorganisms in powder milk (whole and skimmilk) and butter (salty and unsalty). Commercial samples were taken and analysed for: Total Count, Coliforms, Fecal Coliforms, Staphytococous, Psychrotrophs, Thermophilics, Proteolytics, Lipolytics, Enterococci, Salmonella, Molds and Yeasts and Aerobic Spore formes (only for the powder milk samples). The fairly high Total Counts, Coliforms, Fecal Coliforms, Staphylococcus, S. aureus, Enterococci, Proteolytics, Lipolytics, Psychrotrophs, in most samples of dairy products analysed in this work and the presence of Salmonella in some of them, reaveled that they should all be reject for people consuming, once, most pathogenic microorganism countings are above those standards stablished by the "Comissão Nacional de Normas e Padrões para Alimentos". The powder milk samples analysed were according to the Brazilian standards for pathogenies microorganisms .