Water hardness in Bulle
29 °fH very hard
Tap water in Bulle is very hard: 29 °fH (290 mg/L · 16.9 gpg · 16.2 °dH).
Source: Eausud SA; EauSud SA (via SVGW trinkwasser.ch) (2025) · data checked 2026-10-21
Range across supply zones: 220–320 mg/L.
In the canton of Fribourg, drinking water comes from springs and groundwater, in a region of limestone and sandstone from the Prealps and the Plateau. Eausud SA reports a hardness of 290.0 mg/L CaCO₃, with values from 220.0 to 320.0 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 | 29 °fH |
|---|---|
| Utility | Eausud SA |
How Bulle compares
- Tap water in Bulle is 9 % harder than the median of the 650 cities we track in Switzerland (26.7 °fH).
- By hardness it ranks 261 of 650 in Switzerland (1 = hardest); 59 % of these cities have softer water.
- In FR it is number 11 of 26 cities; the regional median is 29 °fH.
- Nearest city with clearly softer water: Morlon, 2 km away (20 °fH).
- Nearest city with clearly harder water: Echarlens, 4 km away (37 °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 Bulle
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 16 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| Hoover | S2 |
| LG | H3 |
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 Bulle water hard or soft?
It is very hard: 290 mg/L as CaCO₃ (16.9 gpg, 16.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Bulle 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 Bulle water?
16.9 gpg, equal to 16.2 °dH, 29 °fH or 290 mg/L calcium carbonate.
What dishwasher salt setting should I use in Bulle?
For 290 mg/L (16.2 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Bulle?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Eausud SA; EauSud SA (via SVGW trinkwasser.ch) (2025). Method: figure published by the water supplier. Eausud SA; EauSud SA (via SVGW trinkwasser.ch) · Outdated figure? Tell us