Table 4.

Pollution load index (PLI) and Degree of contamination (C_d) of trace metals in river sediments.

Stations		PLI	PLI Standard classes [105]		Cd	Cd Standard classes [48]
			Value	Pollution load status		Value	Contamination status
South-West	A1	1.28	PLI <1	No pollution	22.46	Cd < 6	low degree of contamination
	A2	1.48	PLI >1	Polluted	25.23	6 < Cd < 12	moderate degree of contamination
	A3	1.40			23.38	12 < Cd < 24	significant degree of contamination
North-West	B1	0.38			9.52	Cd > 24	high degree of contamination
	B2	0.36			10.03
	B3	0.48			10.28
South-East	C1	0.93			17.39
	C2	0.94			17.36
	C3	1.00			16.97
North-East	D1	0.61			12.14
	D2	0.77			14.17
	D3	0.77			14.08