Metal | Pollution index at the determined sampling distances from the sanitary pits. | ||
3 m | 6 m | 10 m | |
Pb | 6.5 | 1.2 | 0.6 |
Cd | 1 | 0.6 | 0.4 |
Cu | 0.85 | 0.61 | 0.29 |
Zn | 0.70 | 0.40 | 0.16 |