Geochemical concentrations in ground water in Finland
| Element | Median | Mean | SD | 25% | 75% | Number |
|---|---|---|---|---|---|---|
| Water hardness (°dH) | 2.8 | 3.8 | 10.0 | 1.3 | 4.9 | 3621 |
| Ca (mg/l) | 14.4 | 19.9 | 67.3 | 6.9 | 24.4 | 3621 |
| Mg (mg/l) | 3.3 | 4.8 | 5.6 | 1.5 | 6.5 | 3621 |
| Zn (μg/l) | 11.4 | 51.4 | 231.8 | 3.9 | 36.8 | 3621 |
| Al (μg/l) | 10.4 | 88.1 | 310.7 | 1.7 | 61.4 | 3621 |
| Cu (μg/l) | 2.4 | 14.5 | 41.9 | 0.6 | 9.8 | 3621 |
| F− (mg/l) | 0.1 | 0.4 | 0.6 | 0.1 | 0.3 | 12407 |
| Fe (mg/l) | 0.0 | 0.3 | 1.4 | 0.0 | 0.1 | 3621 |
| NO3− (mg/l) | 1.0 | 5.8 | 12.1 | 0.2 | 5.9 | 4039 |