Water hardness in Strassen
13.8 °fH hard
Tap water in Strassen is hard: 13.8 °fH (138 mg/L · 8 gpg · 7.7 °dH).
Source: Administration de la gestion de l'eau (AGE), Dureté de l'eau (data.public.lu, CC0) (2022) · data checked 2026-10-21
This figure is over 3 years old; hardness may have changed.
Luxembourg's public supply relies largely on springs and wells in the Luxembourg sandstone, with some surface water from the Upper Sûre reservoir supplied via the SEBES syndicate. The reported hardness is 137.5 mg/L CaCO₃. This figure dates from 2022 and may have changed. Limescale is visible on kettles, taps and heaters, and a scale-reduction filter or softener can help protect appliances.
Luxembourg communes report hardness in °fH (and °dH).
Water data
| Total hardness | 13.8 °fH |
|---|---|
| Utility | Commune de Strassen |
How Strassen compares
- Tap water in Strassen is 25 % softer than the median of the 101 cities we track in Luxembourg (18.2 °fH).
- By hardness it ranks 82 of 101 in Luxembourg (1 = hardest); 19 % of these cities have softer water.
- In Luxembourg it is number 8 of 10 cities; the regional median is 17.6 °fH.
- Nearest city with clearly softer water: Lenningen, 21 km away (10.1 °fH).
- Nearest city with clearly harder water: Mamer, 4 km away (23.6 °fH).
Ranking of the hardest and softest water in Luxembourg →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Strassen
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 8 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| 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 Strassen water hard or soft?
It is hard: 138 mg/L as CaCO₃ (8 gpg, 7.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Strassen 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 Strassen water?
8 gpg, equal to 7.7 °dH, 13.8 °fH or 138 mg/L calcium carbonate.
What dishwasher salt setting should I use in Strassen?
For 138 mg/L (7.7 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Strassen?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
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