Hardest and softest tap water in Norway
All 89 cities in Norway with published data, ranked by total hardness. The national median is 2 °dH.
Norwegian waterworks report hardness in °dH or mg/L Ca; most supplies are very soft.
25 cities with the hardest water
| # | °dH | mg/L | ||
|---|---|---|---|---|
| 1 | Ringsaker · Innlandet | 5.4 | 96 | moderately hard |
| 2 | Brumunddal · Innlandet | 5 | 89 | moderately hard |
| 3 | Ringerike · Buskerud | 5 | 89 | moderately hard |
| 4 | Tydal · Trøndelag | 4.9 | 88 | moderately hard |
| 5 | Midtre Gauldal · Trøndelag | 4.9 | 87 | moderately hard |
| 6 | Hattfjelldal · Nordland | 4.8 | 86 | moderately hard |
| 7 | Lillehammer · Innlandet | 4.6 | 82 | moderately hard |
| 8 | Alta · Finnmark | 4.5 | 80 | moderately hard |
| 9 | Harstad · Troms og Finnmark | 4.5 | 80 | moderately hard |
| 10 | Osen · Trøndelag | 4 | 71 | moderately hard |
| 11 | Trondheim · Trøndelag | 3.5 | 63 | moderately hard |
| 12 | Ål · Buskerud | 3.4 | 61 | moderately hard |
| 13 | Gildeskål · Nordland | 3.4 | 61 | moderately hard |
| 14 | Rakkestad · Østfold | 3.4 | 60 | soft |
| 15 | Heim · Trøndelag | 3.2 | 57 | soft |
| 16 | Tysnes · Vestland | 3.2 | 57 | soft |
| 17 | Malvik · Trøndelag | 3 | 54 | soft |
| 18 | Nordre Follo · Akershus | 3 | 54 | soft |
| 19 | Halden · Østfold | 3 | 54 | soft |
| 20 | Sola · Rogaland | 3 | 54 | soft |
| 21 | Time · Rogaland | 3 | 54 | soft |
| 22 | Moss · Østfold | 3 | 54 | soft |
| 23 | Bergen · Vestland | 2.8 | 50 | soft |
| 24 | Tønsberg · Vestfold | 2.8 | 50 | soft |
| 25 | Ringebu · Innlandet | 2.8 | 49 | soft |
25 cities with the softest water
| # | °dH | mg/L | ||
|---|---|---|---|---|
| 1 | Stad · Vestland | 0.3 | 5 | soft |
| 2 | Overhalla · Trøndelag | 0.3 | 6 | soft |
| 3 | Herøy · Nordland | 0.4 | 7 | soft |
| 4 | Raarvihke - Røyrvik · Trøndelag | 0.4 | 7 | soft |
| 5 | Lierne · Trøndelag | 0.4 | 7 | soft |
| 6 | Kvinesdal · Agder | 0.4 | 7 | soft |
| 7 | Frøya · Trøndelag | 0.5 | 9 | soft |
| 8 | Indre Fosen · Trøndelag | 0.5 | 10 | soft |
| 9 | Hjelmeland · Rogaland | 0.6 | 10 | soft |
| 10 | Surnadal · Møre og Romsdal | 0.6 | 10 | soft |
| 11 | Rana · Nordland | 0.6 | 11 | soft |
| 12 | Lindesnes · Agder | 0.6 | 11 | soft |
| 13 | Lunner · Akershus | 0.6 | 11 | soft |
| 14 | Frogn · Akershus | 0.6 | 12 | soft |
| 15 | Hægebostad · Agder | 0.7 | 12 | soft |
| 16 | Volda · Møre og Romsdal | 0.7 | 13 | soft |
| 17 | Hitra · Trøndelag | 0.7 | 13 | soft |
| 18 | Verdal · Trøndelag | 0.8 | 14 | soft |
| 19 | Namsos · Trøndelag | 0.8 | 14 | soft |
| 20 | Sunndal · Møre og Romsdal | 0.9 | 17 | soft |
| 21 | Grong · Trøndelag | 1 | 17 | soft |
| 22 | Elverum · Innlandet | 1 | 18 | soft |
| 23 | Asker · Akershus | 1 | 18 | soft |
| 24 | Seljord · Telemark | 1 | 19 | soft |
| 25 | Narvik · Nordland | 1.1 | 19 | soft |