Milk is one of the food products which is used as vehicle of disease transmission tornhuman being. This study was conducted to assess the quality of both raw andrnpasteurized milk produced by the five major milk processing plants in and around AddisrnAbaba.rnA total of 48 samples were taken from the five plants and triplicate of testes werernconducted for each of them including tests for mycobacterium bovis and expressed inrnterms of mean (average).The result indicated that aerobic plate count ranges from 3.5rnx105 to 4.6x106 cfu/ml in raw milk and 1.2x104 to5.2x10 5 cfu/ml in pasteurized milk.rnEscherichia coli which is used as indicator organism for the presence of pathogenicrnorganisms was present in all raw milk and only detected in two pasteurized milk fromrnplant B and plant E. It ranges from 4.33x104 cfu/ml to 5.37x105 cfu/ml in raw milk and 0rncfu/ml to 2.2x104 cfu/ml in pasteurized milk.rnFecal coli forms which is an indicator of poor hygienic condition during milkrnhandling ranged from 3.73x104cfu/ml to 6.67x105 cfu/ml in raw milk samples and 0rncfu/ml to 2.27x104 cfu/ml in pasteurized milk.rnStaphylococcal organisms was also detected in one sample of raw milk from the threernplants and detected in two samples of pasteurized milk from the five milk processingrnplants. The results from the five milk processing plants indicated that there are somernpasteurized milk found with bacterial load above the recommended value of 3-5rnorganisms/ml for coliform organisms by FMOH.From this result it is possible tornconclude that consuming raw milk can lead to different infections.rnKey Words: Aerobic Plate Count, E. coli, Fecal Coliforms, Pasteurization