Tap water hardness in Rogaland
We have published hardness data for 4 cities in Rogaland. The median is 2.5 °dH; the hardest water is in Sola (3 °dH), the softest in Hjelmeland (0.6 °dH).
0 % of these cities have hard or very hard water (over 120 mg/L).
Norwegian waterworks report hardness in °dH or mg/L Ca; most supplies are very soft.
Cities in Rogaland, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Sola | 3 | 54 | soft |
| Time | 3 | 54 | soft |
| Haugesund | 2 | 36 | soft |
| Hjelmeland | 0.6 | 10 | soft |