Characterization and Quantification of Heavy Metals in Oued Sebou Sediments

Table 3

Guiding values for metal contents in sediments (μg/g) proposed by USEPA [5].

Metal	Unpolluted material	Moderately polluted	Heavily polluted
Cd	< 0.1	0.1- 0,2	> 60
Cu	< 25	25−50	> 50
Pb	< 40	40−60	> 60
Zn	< 90	90−200	> 200