Ten contaminated soil samples from the industrial areas of Helwan, Kaluobia and 6th October cities were collected for the isolation of polyhydroxyalkanoates producing bacteria. Serial dilutions, 10-5 or 10-6, were prepared using 0.9% NaCl solution and 100μl of diluted samples were spread on nutrient agar medium supplemented with glucose (1%). After two to seven days incubation at 35°C, potential PHA producers were detected by Sudan Black B (SBB) staining method. Briefly, a 0.02% SBB solution in ethanol (97%) was gently spread over the plates, completely soaking them, incubated at room temperature for 30-60 min, then discarded and washed with ethanol (97%).