Water hardness in Sunndal
0.9 °dH soft
Tap water in Sunndal is soft: 0.9 °dH (17 mg/L · 1 gpg · 1.7 °fH).
Source: Mattilsynet, Vannverksregisteret – drinking-water analyses (Sunndal Vannverk; Kalken Vassverk; Ålvundfjord Vassverk +2), NLOD 2.0 (2025) · data checked 2026-10-21
Range across supply zones: 3–27 mg/L.
Sunndal has five registered supply systems, and the figure here is their median, 16.7 mg/L CaCO₃, within 3.3 to 27.2 mg/L. Some of the underlying values date from 2021, so the median mixes years. The largest system, Sunndal Vannverk, reports 25.0 mg/L. Water is soft throughout, and scale should be minimal.
Norwegian waterworks report hardness in °dH or mg/L Ca; most supplies are very soft.
Water data
| Total hardness | 0.9 °dH |
|---|---|
| Utility | Sunndal Kommune |
How Sunndal compares
- Tap water in Sunndal is 53 % softer than the median of the 89 cities we track in Norway (2 °dH).
- By hardness it ranks 70 of 89 in Norway (1 = hardest); 22 % of these cities have softer water.
- In Møre og Romsdal it is number 5 of 7 cities; the regional median is 1.9 °dH.
- Nearest city with clearly softer water: Surnadal, 34 km away (0.6 °dH).
- Nearest city with clearly harder water: Heim, 63 km away (3.2 °dH).
Ranking of the hardest and softest water in Norway →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Sunndal
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 1 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Sunndal water hard or soft?
It is soft: 17 mg/L as CaCO₃ (1 gpg, 0.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Sunndal safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Norwegian waterworks report hardness in °dH or mg/L Ca; most supplies are very soft.
How many grains per gallon is Sunndal water?
1 gpg, equal to 0.9 °dH, 1.7 °fH or 17 mg/L calcium carbonate.
What dishwasher salt setting should I use in Sunndal?
For 17 mg/L (0.9 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Sunndal?
No. With soft water a softener adds nothing.
Source
Source: Mattilsynet, Vannverksregisteret – drinking-water analyses (Sunndal Vannverk; Kalken Vassverk; Ålvundfjord Vassverk +2), NLOD 2.0 (2025). Method: computed from supplier's calcium and magnesium. Mattilsynet, Vannverksregisteret – drinking-water analyses (Sunndal Vannverk; Kalken Vassverk; Ålvundfjord Vassverk +2), NLOD 2.0 · Outdated figure? Tell us