Water hardness in Wittenheim
20.6 °fH very hard
Tap water in Wittenheim is very hard: 20.6 °fH (206 mg/L · 12 gpg · 11.5 °dH).
Source: Ministère de la Santé (ARS), contrôle sanitaire SISE-Eaux, commune 68376 (2026-08) · data checked 2026-10-19
Range across supply zones: 107–306 mg/L.
Wittenheim in Haut-Rhin is served by the Mulhouse Alsace Agglomération water utility and by Suez. m2A draws from the Doller catchment, the Rhine aquifer and the Lauch and Thur alluvium (according to m2A): 206 mg/L CaCO₃, with a spread from 107 to 306 mg/L. Hardness varies by source.
TH en °fH : douce < 15, moyennement dure 15–25, dure 25–35, très dure > 35 °fH (classes usuelles ARS).
Water data
| Total hardness | 20.6 °fH |
|---|---|
| Utility | Regie De L'Eau M2A; Suez |
How Wittenheim compares
- Tap water in Wittenheim is 14 % softer than the median of the 33641 cities we track in France (23.9 °fH).
- By hardness it ranks 19824 of 33641 in France (1 = hardest); 41 % of these cities have softer water.
- In Haut-Rhin it is number 206 of 360 cities; the regional median is 22.6 °fH.
- Nearest city with clearly softer water: Illzach, 3 km away (10.4 °fH).
- Nearest city with clearly harder water: Ruelisheim, 2 km away (31.7 °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 Wittenheim
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 12 °dH |
| AEG / Electrolux | 3 |
| Beko | 3rd |
| Hoover | S2 |
| 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 Wittenheim water hard or soft?
It is very hard: 206 mg/L as CaCO₃ (12 gpg, 11.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Wittenheim 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 Wittenheim water?
12 gpg, equal to 11.5 °dH, 20.6 °fH or 206 mg/L calcium carbonate.
What dishwasher salt setting should I use in Wittenheim?
For 206 mg/L (11.5 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Wittenheim?
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 68376 (2026-08). Method: own measurement. Ministère de la Santé (ARS), contrôle sanitaire SISE-Eaux, commune 68376 · Outdated figure? Tell us