| Type | Granites | Schistes and volcano-sediment |
| Mafic volcanic |
| Surface waters | |||||||||||||
| Min | Max | Median | n |
| Min | Max | Median | n |
| Min | Max | Median | n |
| Min | Max | Mediane | n | |
| pH | 6.5 | 7 | 6.6 | 9 |
| 6.5 | 7.5 | 6.9 | 6 |
| 5.3 | 7.4 | 6.3 | 6 |
| 7.09 | 7.9 | 7.5 | 5 |
| CE µS・Cm−1 | 49 | 790 | 185 | 9 |
| 129 | 724 | 351 | 6 |
| 59 | 701 | 213 | 6 |
| 47 | 292 | 48 | 5 |
| T˚C | 25.2 | 31.7 | 26.6 | 9 |
| 26.6 | 31 | 29.9 | 6 |
| 28.2 | 32.2 | 30.7 | 6 |
| 23.7 | 25.1 | 24.2 | 5 |
| O2 mg・L−1 | 3.09 | 5.5 | 3.9 | 9 |
| 1.5 | 5.1 | 2.5 | 6 |
| 1.8 | 5.6 | 4.05 | 6 |
| 2.5 | 14.9 | 7.09 | 5 |
| Eh mV | 10.5 | 56.09 | 51 | 9 |
| 15.9 | 59.2 | 52.5 | 6 |
| 6.3 | 51 | 12.15 | 6 |
| 28 | 121.3 | 59.2 | 5 |