Index | Range | Classification | Samples | % |
DC | <10 | Low degree of contamination factor | 10 | 100 |
EF | ≤1 | Background contamination | 8 | 80 |
| 1 - 2 | Minimal enrichment | 2 | 20 |
Er | Er < 40 | Low potential risk | 10 | 100 |
RI | RI < 150 | Low ecological risk | 10 | 100 |
PLI | <1 | No pollution | 10 | 100 |
Igeo | ≤0 | Unpolluted | Li, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Sr, Cd |
|
| 0 - 1 | Unpolluted to moderately polluted | Ba, Pb |
|