Metals   Ocean shore L1 Ocean shore L2 USEPA Value FME Limit WHO
Cr 0.34 ± 0.001a 0.31 ± 0.001a 0.1 0.02-2.0 0.05
Cd 0.08 ± 0.016b 0.21 ± 0.014a 0.005 0.0002-0.0018 0.003
Pb 0.79 ± 0.001a 0.57 ± 0.142b 0.015(Action level) 0.001 0.01
Cu 0.27 ± 0.018a 0.26 ± 0.001a 1 2.0-4.0 2
Zn 0.22 ± 0.001a 0.12 ± 0.001b 2 50 3
Ni 0.01 ± 0.001a 0.01 ± 0.001a - 0.0017 0.02
Data are mean of duplicate (2) determination. BDL: Below instrument detection limit. Letters a and b show differences among the different locations. Data shown with different letters are statistically different at P<0.05 level.
Table 1: Mean Concentration of heavy metals in the present studies and some international standard.