| Variables | Components | ||
| F1 | F2 | F3 | |
| Cr | −0.86 | −0.22 | −0.13 |
| Zn | −0.84 | −0.24 | 0.28 |
| As | −0.84 | 0.40 | 0.19 |
| Pb | −0.79 | 0.54 | 0.07 |
| Cd | −0.73 | 0.29 | −0.45 |
| Hg | −0.71 | 0.64 | −0.02 |
| Ni | −0.69 | −0.58 | 0.38 |
| Cu | −0.53 | −0.77 | 0.07 |
| Mn | −0.44 | −0.51 | −0.67 |
| Eugenvalues | 4.77 | 2.25 | 0.93 |
| % Total variance explained | 52.95 | 24.97 | 10.39 |
| % Cumulated variances | 52.95 | 77.92 | 88.31 |