Water hardness in Raismes
33.1 °fH very hard
Tap water in Raismes is very hard: 33.1 °fH (331 mg/L · 19.3 gpg · 18.5 °dH).
Source: Ministère de la Santé (ARS), contrôle sanitaire SISE-Eaux, commune 59491 (2026-08) · data checked 2026-10-19
Range across supply zones: 244–514 mg/L.
Raismes (Nord) is supplied by Eau Du Valenciennois. The median is 331 mg/L CaCO₃, but the August 2026 measurements run from 244 to 514 mg/L. The top value is well above the median, so the range is the better guide.
TH en °fH : douce < 15, moyennement dure 15–25, dure 25–35, très dure > 35 °fH (classes usuelles ARS).
Water data
| Total hardness | 33.1 °fH |
|---|---|
| Utility | Eau Du Valenciennois |
How Raismes compares
- Tap water in Raismes is 38 % harder than the median of the 33641 cities we track in France (23.9 °fH).
- By hardness it ranks 4442 of 33641 in France (1 = hardest); 86 % of these cities have softer water.
- In Nord it is number 525 of 634 cities; the regional median is 35.8 °fH.
- Nearest city with clearly softer water: Valenciennes, 4 km away (24.4 °fH).
- Nearest city with clearly harder water: Bruay-sur-l'Escaut, 4 km away (47 °fH).
Ranking of the hardest and softest water in France →
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 Raismes
| 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 Raismes water hard or soft?
It is very hard: 331 mg/L as CaCO₃ (19.3 gpg, 18.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Raismes safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. TH en °fH : douce < 15, moyennement dure 15–25, dure 25–35, très dure > 35 °fH (classes usuelles ARS).
How many grains per gallon is Raismes water?
19.3 gpg, equal to 18.5 °dH, 33.1 °fH or 331 mg/L calcium carbonate.
What dishwasher salt setting should I use in Raismes?
For 331 mg/L (18.5 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Raismes?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Ministère de la Santé (ARS), contrôle sanitaire SISE-Eaux, commune 59491 (2026-08). Method: own measurement. Ministère de la Santé (ARS), contrôle sanitaire SISE-Eaux, commune 59491 · Outdated figure? Tell us