Tap water hardness in Østfold
We have published hardness data for 6 cities in Østfold. The median is 2.7 °dH; the hardest water is in Rakkestad (3.4 °dH), the softest in Marker (2.2 °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 Østfold, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Rakkestad | 3.4 | 60 | soft |
| Halden | 3 | 54 | soft |
| Moss | 3 | 54 | soft |
| Skiptvet | 2.4 | 43 | soft |
| Fredrikstad | 2.3 | 41 | soft |
| Marker | 2.2 | 40 | soft |