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Mean value of the contamination index with three different piezometers taken as the hydrochemical background.
| Piezometer | Cd with P9 | Cd with Pz2 | Cd with Pz7 |
|---|---|---|---|
| P1 | 121.72 | 4.27 | 52.34 |
| P2 | 142.91 | 4.43 | 45.73 |
| P3 | 121.09 | 7.86 | 67.39 |
| P4 | 378.02 | 8.83 | 75.54 |
| P5 | 391.44 | 8.71 | 66.41 |
| P6 | 185.52 | 7.77 | 55.91 |
| P7 | 188.91 | 7.10 | 52.37 |
| P8 | 239.44 | 4.95 | 42.99 |
| P9 | 1.00 | −0.27 | 17.24 |
| P10 | 1422.59 | 19.79 | 98.59 |
| Pz2 | 148.19 | 1.00 | 20.14 |
| Pz7 | 23.93 | −3.21 | 1.00 |
