Element | pH | Iron (mg/l) | Aluminium (mg/l) | Zinc (mg/l) | Copper (mg/l) | Lead (mg/l) | Arsenic (mg/l) | Magnesium (mg/l) | Cadmium (mg/l) |
Upper range | 2.8 | 550 | 90 | 60 | 25 | 0.40 | 1.60 | 90 | 0.20 |
Lower range | 2.2 | 150 | 40 | 22 | 15 | 0.2 | 0.40 | 40 | 0.1 |