Table 3.

Analysis of heavy metals (mg/kg) in cucumber, tomato, coriander leaf, and lettuce leaf samples.

Names of RSVs	Level of heavy metals contamination
	Lead (Pb)	Cadmium (Cd)	Chromium (Cr)
Cucumber (n = 30)	≤0.066; n1 = 16	≤0.016; n1 = 3	≤0.060; n1 = 8
Tomato (n = 30)	≤0.025; n1 = 23	≤0.045; n1 = 3	≤0.094; n1 = 6
Coriander leaf (n = 30)	0.011–0.22	0.04–0.21	0.05–0.44
Lettuce leaf (n = 30)	0.018–0.30	0.14; n1 = 4	0.022–0.25

n = Total number of samples.

n₁ = Number of samples where heavy metals were non-detectable.

Maximum permissible limit of Pb = 0.3 mg/kg (Mohod, 2015); Cd = 0.1 mg/kg (Mohod, 2015); Cr = 2.4 mg/kg (Hamid et al., 2017).