Table 5.

Contamination factor (Cf) and pollution load index (PLI) for heavy metals in vegetables

Vegetable	Cf						PLI
	Cd	Co	Cu	Ni	Pb	Zn
T. occidentalis	0.30	0.008	0.63	0	0.03	1.74	0.40
P. mildbraedii	0.55	0.009	0.62	0	0.04	1.72	0.47
G. latifolium	0.45	0.001	0.27	0	0.02	1.06	0.30
V. amygdalina	0.35	0.020	0.49	0	0.04	1.42	0.40

^*Cd: cadmium, Co: cobalt, Cu: copper, Ni: nickel, Pb: lead, Zn: zinc.