Water hardness in Biwer
11.2 °fH moderately hard
Tap water in Biwer is moderately hard: 11.2 °fH (112 mg/L · 6.5 gpg · 6.2 °dH).
Source: Administration de la gestion de l'eau (AGE), Dureté de l'eau (data.public.lu, CC0) (2022) · data checked 2026-10-20
This figure is over 3 years old; hardness may have changed.
Luxembourg communes report hardness in °fH (and °dH).
Water data
| Total hardness | 11.2 °fH |
|---|---|
| Utility | Commune de Biwer |
How Biwer compares
- Tap water in Biwer is 39 % softer than the median of the 101 cities we track in Luxembourg (18.2 °fH).
- By hardness it ranks 97 of 101 in Luxembourg (1 = hardest); 4 % of these cities have softer water.
- In Grevenmacher it is number 8 of 8 cities; the regional median is 13.2 °fH.
- Nearest city with clearly softer water: Mertzig, 30 km away (8.1 °fH).
- Nearest city with clearly harder water: Betzdorf, 3 km away (16.7 °fH).
Ranking of the hardest and softest water in Luxembourg →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Biwer
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 6 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Biwer water hard or soft?
It is moderately hard: 112 mg/L as CaCO₃ (6.5 gpg, 6.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Biwer safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Luxembourg communes report hardness in °fH (and °dH).
How many grains per gallon is Biwer water?
6.5 gpg, equal to 6.2 °dH, 11.2 °fH or 112 mg/L calcium carbonate.
What dishwasher salt setting should I use in Biwer?
For 112 mg/L (6.2 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Biwer?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Administration de la gestion de l'eau (AGE), Dureté de l'eau (data.public.lu, CC0) (2022). Method: figure published by the water supplier. Administration de la gestion de l'eau (AGE), Dureté de l'eau (data.public.lu, CC0) · Outdated figure? Tell us