Water hardness in Norway
89 cities with published hardness data, sorted by population. Median: 2 °dH.
Median
2 °dH
36 mg/L CaCO₃ · soft
- 76 soft
- 13 moderately hard
Norwegian waterworks report hardness in °dH or mg/L Ca; most supplies are very soft.
Ranking of the hardest and softest water in Norway →
Regions
- Agder4 · 0.6 °dH
- Akershus7 · 1.4 °dH
- Buskerud4 · 2.8 °dH
- Innlandet7 · 2.8 °dH
- Møre og Romsdal7 · 1.9 °dH
- Nordland10 · 1.9 °dH
- Østfold6 · 2.7 °dH
- Rogaland4 · 2.5 °dH
- Telemark4 · 2.4 °dH
- Trøndelag21 · 1.8 °dH
- Vestfold3 · 1.4 °dH
- Vestland6 · 2.6 °dH
Largest places, hardest first
Every place is listed on its region page.
| °dH | mg/L | ||
|---|---|---|---|
| Ringsaker · Innlandet | 5.4 | 96 | moderately hard |
| Ringerike · Buskerud | 5 | 89 | moderately hard |
| Brumunddal · Innlandet | 5 | 89 | moderately hard |
| Lillehammer · Innlandet | 4.6 | 82 | moderately hard |
| Alta · Finnmark | 4.5 | 80 | moderately hard |
| Harstad · Troms og Finnmark | 4.5 | 80 | moderately hard |
| Trondheim · Trøndelag | 3.5 | 63 | moderately hard |
| Malvik · Trøndelag | 3 | 54 | soft |
| Nordre Follo · Akershus | 3 | 54 | soft |
| Sola · Rogaland | 3 | 54 | soft |
| Time · Rogaland | 3 | 54 | soft |
| Halden · Østfold | 3 | 54 | soft |
| Moss · Østfold | 3 | 54 | soft |
| Bergen · Vestland | 2.8 | 50 | soft |
| Tønsberg · Vestfold | 2.8 | 50 | soft |
| Skien · Telemark | 2.8 | 49 | soft |
| Bærum · Akershus | 2.7 | 49 | soft |
| Askøy · Vestland | 2.7 | 48 | soft |
| Kristiansund · Møre og Romsdal | 2.6 | 46 | soft |
| Ørland · Trøndelag | 2.5 | 46 | soft |
| Åsane · Vestland | 2.5 | 45 | soft |
| Nesttun · Vestland | 2.5 | 45 | soft |
| Bodø · Nordland | 2.5 | 45 | soft |
| Levanger · Trøndelag | 2.4 | 44 | soft |
| Oslo · Oslo | 2.4 | 43 | soft |
| Fredrikstad · Østfold | 2.3 | 41 | soft |
| Øvre Eiker · Buskerud | 2.1 | 38 | soft |
| Sortland · Nordland | 2.1 | 38 | soft |
| Ålesund · Møre og Romsdal | 2 | 36 | soft |
| Haugesund · Rogaland | 2 | 36 | soft |
| Arendal · Agder | 2 | 36 | soft |
| Hamar · Innlandet | 2 | 36 | soft |
| Molde · Møre og Romsdal | 2 | 36 | soft |
| Orkland · Trøndelag | 1.9 | 34 | soft |
| Ørsta · Møre og Romsdal | 1.9 | 34 | soft |
| Stjørdal · Trøndelag | 1.8 | 32 | soft |
| Larvik · Vestfold | 1.4 | 25 | soft |
| Færder · Vestfold | 1.4 | 25 | soft |
| Tromsø · Troms | 1.4 | 25 | soft |
| Lillestrøm · Akershus | 1.4 | 25 | soft |
| Narvik · Nordland | 1.1 | 19 | soft |
| Asker · Akershus | 1 | 18 | soft |
| Elverum · Innlandet | 1 | 18 | soft |
| Namsos · Trøndelag | 0.8 | 14 | soft |
| Verdal · Trøndelag | 0.8 | 14 | soft |
| Frogn · Akershus | 0.6 | 12 | soft |
| Rana · Nordland | 0.6 | 11 | soft |
| Indre Fosen · Trøndelag | 0.5 | 10 | soft |