Water hardness in Wanze
33.4 °fH very hard
Tap water in Wanze is very hard: 33.4 °fH (334 mg/L · 19.5 gpg · 18.7 °dH).
Source: SPW, qualité de l'eau potable par zone de distribution, année civile 2025 (2025) · data checked 2026-10-19
Range across supply zones: 306–362 mg/L.
Wanze (province of Liège) is served by both CILE and SWDE. For 2025 the SPW gives a median of 334 mg/L CaCO₃, ranging from 306 to 362 mg/L by zone, which is very hard. The value therefore depends somewhat on the street and the distributor. Limescale collects on heating elements and taps.
Belgian suppliers report hardness in °f (French degrees); 1 °f = 10 mg/L CaCO₃.
Water data
| Total hardness | 33.4 °fH |
|---|---|
| Utility | CILE, SWDE |
How Wanze compares
- Tap water in Wanze is 6 % harder than the median of the 1091 cities we track in Belgium (31.6 °fH).
- By hardness it ranks 485 of 1091 in Belgium (1 = hardest); 55 % of these cities have softer water.
- In Liège it is number 98 of 237 cities; the regional median is 27.3 °fH.
- Nearest city with clearly softer water: Amay, 7 km away (18.8 °fH).
- Nearest city with clearly harder water: Waret-l'Évêque, 10 km away (43.5 °fH).
Ranking of the hardest and softest water in Belgium →
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 Wanze
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 19 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| Hoover | S3 |
| 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 Wanze water hard or soft?
It is very hard: 334 mg/L as CaCO₃ (19.5 gpg, 18.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Wanze safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Belgian suppliers report hardness in °f (French degrees); 1 °f = 10 mg/L CaCO₃.
How many grains per gallon is Wanze water?
19.5 gpg, equal to 18.7 °dH, 33.4 °fH or 334 mg/L calcium carbonate.
What dishwasher salt setting should I use in Wanze?
For 334 mg/L (18.7 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Wanze?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: SPW, qualité de l'eau potable par zone de distribution, année civile 2025 (2025). Method: figure published by the water supplier. SPW, qualité de l'eau potable par zone de distribution, année civile 2025 · Outdated figure? Tell us