Water hardness in Rebecq-Rognon
49.8 °fH very hard
Tap water in Rebecq-Rognon is very hard: 49.8 °fH (498 mg/L · 29.1 gpg · 27.9 °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: 452–506 mg/L.
SWDE distributes water in Rebecq-Rognon. SPW (2025) publishes a median hardness of 49.8 °f, ranging from 45.2 to 50.6 °f, well above the Walloon 35 °f threshold for very hard water. It is the highest value in this batch. Scaling is pronounced and a softener is often useful.
Belgian suppliers report hardness in °f (French degrees); 1 °f = 10 mg/L CaCO₃.
Water data
| Total hardness | 49.8 °fH |
|---|---|
| Utility | SWDE |
How Rebecq-Rognon compares
- Tap water in Rebecq-Rognon is 58 % harder than the median of the 1091 cities we track in Belgium (31.6 °fH).
- By hardness it ranks 6 of 1091 in Belgium (1 = hardest); 99 % of these cities have softer water.
- In Brabant wallon it is number 2 of 82 cities; the regional median is 36.6 °fH.
- Nearest city with clearly softer water: Ronquières, 9 km away (27.5 °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 Rebecq-Rognon
| Brand | Setting for this water |
|---|---|
| Bosch | H06 |
| Miele | 28 °dH |
| AEG / Electrolux | 6 |
| Beko | 6th |
| Hoover | S4 |
| LG | H4 |
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 Rebecq-Rognon water hard or soft?
It is very hard: 498 mg/L as CaCO₃ (29.1 gpg, 27.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Rebecq-Rognon 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 Rebecq-Rognon water?
29.1 gpg, equal to 27.9 °dH, 49.8 °fH or 498 mg/L calcium carbonate.
What dishwasher salt setting should I use in Rebecq-Rognon?
For 498 mg/L (27.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Rebecq-Rognon?
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