Table 3.

Heavy metal tolerance level for sewage wastewater bacterial isolates (n=6)

Bacterial strain	Heavy metal tolerance (µg ml−1)
	Hg2+	Cd2+	Cr6+	Cu2+
A. baumannii ST1	2	25	50	650
E. coli ST2	2	100	75	650
E. coli ST3	2	100	75	650
E. coli ST4	3	100	75	650
E. faecalis ST5	2	50	250	750
P. putida ST6	2	250	300	850