Water hardness in La Chapelle-Saint-Luc
28.6 °fH very hard
Tap water in La Chapelle-Saint-Luc is very hard: 28.6 °fH (286 mg/L · 16.7 gpg · 16 °dH).
Source: Ministère de la Santé (ARS), contrôle sanitaire SISE-Eaux, commune 10081 (2026-03) · data checked 2026-10-19
La Chapelle-Saint-Luc (Aube) is served by the Régie du S.D.D.E.A. The ARS health control (SISE-Eaux, March 2026) measures 286 mg/L CaCO₃, which is very hard. Only a single value is published, with no range.
TH en °fH : douce < 15, moyennement dure 15–25, dure 25–35, très dure > 35 °fH (classes usuelles ARS).
Water data
| Total hardness | 28.6 °fH |
|---|---|
| Utility | Regie Du S.D.D.E.A. |
How La Chapelle-Saint-Luc compares
- Tap water in La Chapelle-Saint-Luc is 20 % harder than the median of the 33641 cities we track in France (23.9 °fH).
- By hardness it ranks 10518 of 33641 in France (1 = hardest); 68 % of these cities have softer water.
- In Aube it is number 102 of 405 cities; the regional median is 26.9 °fH.
- Nearest city with clearly softer water: Sainte-Maure, 4 km away (20.3 °fH).
- Nearest city with clearly harder water: La Villeneuve-au-Chêne, 27 km away (37.5 °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 La Chapelle-Saint-Luc
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 16 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| Hoover | S2 |
| 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 La Chapelle-Saint-Luc water hard or soft?
It is very hard: 286 mg/L as CaCO₃ (16.7 gpg, 16 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in La Chapelle-Saint-Luc 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 La Chapelle-Saint-Luc water?
16.7 gpg, equal to 16 °dH, 28.6 °fH or 286 mg/L calcium carbonate.
What dishwasher salt setting should I use in La Chapelle-Saint-Luc?
For 286 mg/L (16 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in La Chapelle-Saint-Luc?
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 10081 (2026-03). Method: own measurement. Ministère de la Santé (ARS), contrôle sanitaire SISE-Eaux, commune 10081 · Outdated figure? Tell us