INDEX

Range

Classification

Samples

%

DC

<10

low degree of contamination factor

37

100

EF

2 - 5

Moderate enrichment

8

21.6

5 - 20

Significant enrichment

14

37.8

20 - 40

Very high enrichment

15

40.6

Er

<40

Low potential risk

37

100

RI

<150

Low ecological risk

37

100

PLI

<1

No pollution risk

37

100

Igeo

0 - 1

Unpolluted to moderated pollution risk from

Li, V, Cr, Co, As, Cd, Pb

3 - 4

Strong pollution risk from

Ba

>6

Extreme pollution risk from

Mn, Fe, Ni, Cu, Zn, Sr