Water hardness in Crans-Montana
18.6 °fH very hard
Tap water in Crans-Montana is very hard: 18.6 °fH (186 mg/L · 10.9 gpg · 10.4 °dH).
Source: Commune de Crans-Montana, Louis Berclaz (via SVGW trinkwasser.ch) (2025) · data checked 2026-10-21
Range across supply zones: 139–232 mg/L.
In Valais, drinking water comes from springs and groundwater, and the hardness depends strongly on the rock in the catchment. Commune de Crans-Montana, Louis Berclaz reports a hardness of 186.0 mg/L CaCO₃, with values from 139.0 to 232.0 mg/L depending on the address. Scale forms quickly on heating elements and fittings, so a softener or strict descaling routine is worth considering.
In der Schweiz wird meist in °fH angegeben (1 °fH = 0,56 °dH).
Water data
| Total hardness | 18.6 °fH |
|---|---|
| Utility | Commune de Crans-Montana, Louis Berclaz |
How Crans-Montana compares
- Tap water in Crans-Montana is 30 % softer than the median of the 650 cities we track in Switzerland (26.7 °fH).
- By hardness it ranks 517 of 650 in Switzerland (1 = hardest); 20 % of these cities have softer water.
- In VS it is number 4 of 17 cities; the regional median is 13.7 °fH.
- Nearest city with clearly softer water: Grône, 7 km away (12.5 °fH).
- Nearest city with clearly harder water: Sion, 13 km away (25.2 °fH).
Ranking of the hardest and softest water in Switzerland →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Crans-Montana
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 10 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S2 |
| LG | H2 |
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 Crans-Montana water hard or soft?
It is very hard: 186 mg/L as CaCO₃ (10.9 gpg, 10.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Crans-Montana safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. In der Schweiz wird meist in °fH angegeben (1 °fH = 0,56 °dH).
How many grains per gallon is Crans-Montana water?
10.9 gpg, equal to 10.4 °dH, 18.6 °fH or 186 mg/L calcium carbonate.
What dishwasher salt setting should I use in Crans-Montana?
For 186 mg/L (10.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Crans-Montana?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Commune de Crans-Montana, Louis Berclaz (via SVGW trinkwasser.ch) (2025). Method: figure published by the water supplier. Commune de Crans-Montana, Louis Berclaz (via SVGW trinkwasser.ch) · Outdated figure? Tell us