Sampling sites Cd(wet season) Cd(wet season) excluding Se Cd(dry season) Cd(dry season) excluding Se R1 0.041 0.041 0.049 0.049 R2 1.067 0.067 0.065 0.065 Average 0.550 0.050 0.060 0.060 E1 15.00 0.200 8.420 0.420 E2 14.06 0.460 0.240 0.240 Average 14.530 0.330 4.330 0.330

Table 4: Contamination degree (Cd) at each sample site along the Isipingo River and Estuary.