Courmayeur
Courmayeur is sourced from springs at the foot of Mont Blanc in the municipality of Courmayeur, Aosta Valley, north-western Italy. The mineral springs of the area were noted for their therapeutic properties from the 17th century, when the town began attracting visitors seeking sulphate-rich waters. Commercial bottling in the modern era made the brand widely available, primarily in France. Courmayeur is currently owned by Sources ALMA, the French water group that also owns Vichy Célestins, St-Yorre, and several other brands. Courmayeur holds natural mineral water status. Note: the TWD database records sodium and chloride at 0 mg/L; these likely represent values at or below the limit of detection rather than true zeroes.
Mineral composition
| mg/L | |
|---|---|
| Calcium | 557 |
| Magnesium | 68 |
| Sodium | 0 |
| Sulfate | 1423 |
| Chloride | 0 |
| Bicarbonate | 180 |
Compositions can vary by season and source. Read our methodology.
Mineral character
Courmayeur is the most calcium-rich water in the TWD database. Calcium is 557 mg/L and sulphate is 1,423 mg/L; these two ions account for the overwhelming majority of the mineral load. Bicarbonate is 180 mg/L; magnesium is 68 mg/L; sodium and chloride are both recorded at 0 mg/L. Total hardness is 1,671 mg/L as CaCO₃; alkalinity is 148 mg/L as CaCO₃. TDS is approximately 2,231 mg/L. The defining feature is the contrast between extraordinary hardness and moderate alkalinity: Courmayeur is essentially a calcium-sulphate water, the most extreme example of that type in the database. For comparison, Vittel (the next most sulphate-heavy widely distributed water) reaches sulphate 306 mg/L and calcium 202 mg/L; Courmayeur’s values are roughly five and three times higher respectively.
Documented use and context
Courmayeur appears in TWD blending outputs as a source of calcium and sulphate for profiles that require high hardness without elevated alkalinity or sodium. Given the concentrations involved, very small volumes shift calcium and sulphate substantially.
Use-case suitability
- CoffeeNot used in any current coffee recipe. Hardness 1671 mg/L is above the 9–266 mg/L range of these targets.
- TeaNot used in any current tea recipe. Hardness 1671 mg/L is above the 37–59 mg/L range of these targets.
- BrewingAppears in blends for Burton-on-Trent.
- BakingNot used in any current baking recipe. Hardness 1671 mg/L is above the 46–390 mg/L range of these targets.
- AquariumNot used in any current aquarium recipe. Hardness 1671 mg/L is above the 35–212 mg/L range of these targets.
- HorticultureNot used in any current horticulture recipe. Hardness 1671 mg/L is above the 12–54 mg/L range of these targets.
Used in these recipes
Where to buy
FR
Carrefour, Leclerc, Auchan, Intermarché
€0.60-0.80 per litre
Courmayeur is available primarily in France at Carrefour, Leclerc, Auchan, and Intermarché, typically €0.60–0.80 (as of March 2026). Despite its Italian source, French retail availability significantly exceeds Italian distribution. Sold in still format in PET bottles.