Index

Range

Classification

SN

%

DC

<10

Low degree of contamination factor

12

100

EF

≤1

Background contamination

4

33.4

1 - 2

Minimal enrichment

1

8.3

2 - 5

Moderate enrichment

1

8.3

5 - 20

Significant enrichment

5

41.7

20 - 40

Very high enrichment

1

8.3

Er

<40

Low potential risk

12

100

RI

<150

Low ecological risk

12

100

PLI

<1

No pollution

12

100

Igeo

≤0

No-pollution

Pb, Co, Cu, Cr, Mn, Sr, Cd, V, Ni, As, Li, Ba, Mn

0 - 1

No pollution to moderately pollution

Sr, Fe, Zn

1 - 2

Moderately pollution to pollution

Fe, Zn

2 - 3

Pollution to strong pollution

Fe, Zn