pH | 7.8 |
pH after aeration | 8.2 |
Acidity to pH 8.3 (as CO3) | 1 g/m³ |
Total alkalinity to pH 4.5 as HCO3 | 52 g/m³ |
Turbidity (NTU) | Less than 1 |
Nitrate Nitrogen | 1 g/m³ |
Sulphate | 5.0 g/m³ |
Chloride | 5.0 g/m³ |
Calcium | 12.0 g/m³ |
Fluoride | Less than 0.1 g/m³ |
Magnesium | 1.5 g/m³ |
Potassium | 1 g/m³ |
Sodium | 6.1 g/m³ |
Reactive silica (as SO2) | 16.0 g/m³ |
Total hardness (as CaCO3) | 45 g/m³ |
Conductivity at 20?C (mS/m) | 10 |
Note: Grams per cubic meter (g/m³) is equivalent to milligrams per litre (mg/l).
There are a total of 38 routine chemical tests carried out on Christchurch water. 22 of these tests establish the presence of the specific chemical tested for, in order to be below measurable limits.
