Metal | Mean heavy metal concentrations (µg/g) at determined sampling distances from the sanitary pits | F test, p value | [12] Permissible limits | ||
3 m | 6 m | 10 m | |||
Pb | 0.13 ± 0.01 | 0.06 ± 0.02 | 0.03 ± 0.01 | 0.01 | 0.05 |
Cd | 0.05 ± 0.01 | 0.03 ± 0.01 | 0.02 ± 0.00 | 0.02 | 0.03 |
Cu | 1.71 ± 0.21 | 1.02 ± 0.10 | 0.46 ± 0.14 | 0.01 | 2 |
Zn | 7.03 ± 0.29 | 4.02 ± 0.51 | 1.63 ± 0.30 | 0.01 | 10 |