Tap water hardness in Trøndelag
We have published hardness data for 21 cities in Trøndelag. The median is 1.8 °dH; the hardest water is in Tydal (4.9 °dH), the softest in Overhalla (0.3 °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 Trøndelag, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Tydal | 4.9 | 88 | moderately hard |
| Midtre Gauldal | 4.9 | 87 | moderately hard |
| Osen | 4 | 71 | moderately hard |
| Trondheim | 3.5 | 63 | moderately hard |
| Heim | 3.2 | 57 | soft |
| Malvik | 3 | 54 | soft |
| Ørland | 2.5 | 46 | soft |
| Levanger | 2.4 | 44 | soft |
| Orkland | 1.9 | 34 | soft |
| Stjørdal | 1.8 | 32 | soft |
| Høylandet | 1.8 | 32 | soft |
| Nærøysund | 1.1 | 19 | soft |
| Grong | 1 | 17 | soft |
| Namsos | 0.8 | 14 | soft |
| Verdal | 0.8 | 14 | soft |
| Hitra | 0.7 | 13 | soft |
| Indre Fosen | 0.5 | 10 | soft |
| Frøya | 0.5 | 9 | soft |
| Lierne | 0.4 | 7 | soft |
| Raarvihke - Røyrvik | 0.4 | 7 | soft |
| Overhalla | 0.3 | 6 | soft |