Area	Fe	Mn	Zn	Cr	Cu	Pb	Ni	Co	Cd	Hg
Masan Bay (Lee, Min, 1990)	3.10	561	690	100	140	54	53	18	3.0	0.46
Manila Bay (Prudente et al., 1988)	3.28	656	136	-	55	35	15	11	2.2	-
Seto Inland Sea (Hirata, 1985)	3.25	879	241	58	38	-	49	18	-	-
Bohai Bay (Ye, 1991)	3.50	500	74	50	25	22	35	-	-	0.09
Huanghe Estuary (Zhang et al., 1988)	0.19	438	71	64	22	2	47	-	-	-