Contamination Factor (CF), Degree of Contamination (Cdeg) and Pollution Load Index (PLI) of heavy metals in groundwater and soil of residential area around Awotan landfill, Ibadan, Southwest-Nigeria.

Table 5: Contamination Factor (CF), Degree of Contamination (C_deg) and Pollution Load Index (PLI) of heavy metals in groundwater and soil of residential area around Awotan landfill, Ibadan, Southwest-Nigeria.

Heavy metals	Groundwater C_F				Soil C_F
	GWA		GWb		Sa		Sb
Pb	2.50	Moderate contamination	1.50	Moderate contamination	1.47	Moderate contamination	1.36	Moderate contamination
Cd	2.00	Moderate contamination	1.00	Moderate contamination	1.48	Moderate contamination	1.10	Moderate contamination
Cr	2.00	Moderate contamination	NE	NE	2.85	Moderate contamination	1.69	Moderate contamination
Ni	1.50	Moderate contamination	1.00	Moderate contamination	1.71	Moderate contamination	0.94	Low contamination
Cu	1.67	Moderate contamination	0.67	Low contamination	4.24	Considerable contamination	2.57	Moderate contamination
Fe	2.00	Moderate contamination	1.00	Moderate contamination	1.53	Moderate contamination	1.37	Moderate contamination
Zn	2.67	Moderate contamination	3.00	Considerable contamination	1.64	Moderate contamination	1.81	Moderate contamination
C_deg ₌∑ (C_Fs)	14. 34	Moderate degree of contamination	8.17	Moderate degree of contamination	14.92	Moderate degree of contamination	10.84	Moderate degree of contamination
PLI	2.01	Heavy metal pollution	1.17	Heavy metal pollution	1.96	Heavy metal pollution	1.47	Heavy metal pollution

*nd = not determined