Table 2 Degree of soil contamination based on geoaccumulation index (Igeo) (Huang et al. 2017)
Igeo value | Degree of soil contamination |
|---|---|
Igeo ≤ 0 | Practically uncontaminated |
0 < Igeo < 1 | Uncontaminated to moderately contaminated |
1 < Igeo < 2 | Moderately contaminated |
2 < Igeo < 3 | Moderately to heavily contaminated |
3 < Igeo < 4 | Heavily contaminated |
4 < Igeo < 5 | Heavily to extremely contaminated |
5 < Igeo | Extremely contaminated |