EF

value

Class

Designation of soil quality (enrichment level)

PERI value

PERI class

Designation of soil quality (PERI)

Igeo Value

Igeo Class

Designation of soil quality (Pollution Intensity)

<1

<1

0

no enrichment

<40

0

low risk

≤0

0

Uncontaminated

1 - 2

EF < 2

1

depletion or deficiency to minimal enrichment

≤40 < 80

1

moderate risk

0 - 1

1

uncontaminated to moderately contaminated

2 - 5

EF 2 - 5

2

moderate enrichment

80 ≤ PERI < 160

2

considerable risk

1 - 2

2

moderately contaminated

5 - 20

EF 5 - 20

3

significant enrichment

160 ≤ PERI < 320

3

high risk

2 - 3

3

moderately to strongly contaminated

20 - 40

EF 20 - 40

4

very high enrichment

≥320

4

very high risk

3 - 4

4

strongly contaminated

>40

EF > 40

5

Extremely high enrichment

4 - 5

5

strongly to extremely contaminated

≥5

6

extremely contaminated