Table 2.

Average heavy metal concentration in rice samples of Savar, Gazipur and Ashulia.

Heavy metals (mg/kg)	Fe	Cu	Zn	Cd	Pb	Cr	Co	Ni	As
Rice	14.89	38.12	121.76	1.43	1.21	19.78	12.08	ND	0.075	Savar
	9.49	25.34	107.43	0.98	ND	11.54	8.54	0.18	0.031	Gazipur
	11.87	19.74	97.34	1.61	1.32	23.67	18.11	ND	0.048	Ashulia
WHO/FAO recommended maximum tolerance value (mg/kg)	450	40	60	0.3	5	5	0.2	0.1	0.5

^∗ ND: not detected.