Class

Value

Soil quality level

0

Igeo < 0

Uncontaminated

1

0 < Igeo < 1

Uncontaminated to moderately

2

1 < Igeo < 2

Moderately Contaminated

3

2 < Igeo < 3

Moderately to heavily contaminated

4

3 < Igeo < 4

Heavily Contaminated

5

4 < Igeo < 5

Heavily contaminated to Extremely Contaminated

6

Igeo > 5

Extremely Contaminated