Bar-le-Duc
Bar-le-Duc is a natural mineral water bottled at the Grebbe spring in the Utrecht Hills (Utrechtse Heuvelrug) in the Netherlands. The brand name refers to the municipality of Bunnik in Utrecht province. The brand describes a filtration period of approximately 1,200 years through the Utrechtse Heuvelrug sand deposits, though this figure is an estimate based on hydrological modelling rather than a directly measured age.
Mineral composition
| mg/L | |
|---|---|
| Calcium | 54 |
| Magnesium | 4 |
| Sodium | 11 |
| Sulfate | 1 |
| Chloride | 11 |
| Bicarbonate | 185 |
Compositions can vary by season and source. Read our methodology.
Mineral character
Calcium is 54 mg/L, magnesium 3.7 mg/L, sodium 10.7 mg/L, sulphate 1 mg/L, chloride 10.6 mg/L, and bicarbonate 185 mg/L. Hardness is 150 mg/L as CaCO₃. The notable feature is the extremely low sulphate at 1 mg/L, reflecting the siliceous sand geology of the Utrechtse Heuvelrug, which lacks evaporite minerals. Bicarbonate is the dominant anion.
Use-case suitability
- CoffeeNot used in any current coffee recipe, but hardness 150 mg/L sits within the 9–266 mg/L range typical for these targets.
- TeaNot used in any current tea recipe. Hardness 150 mg/L is above the 37–59 mg/L range of these targets.
- BrewingNot used in any current brewing recipe, but hardness 150 mg/L sits within the 26–922 mg/L range typical for these targets.
- BakingNot used in any current baking recipe, but hardness 150 mg/L sits within the 46–390 mg/L range typical for these targets.
- AquariumNot used in any current aquarium recipe, but hardness 150 mg/L sits within the 35–212 mg/L range typical for these targets.
- HorticultureNot used in any current horticulture recipe. Hardness 150 mg/L is above the 12–54 mg/L range of these targets.
Where to buy
NL
Albert Heijn, Jumbo
€0.40-0.50 per litre
Available in the Netherlands. As of March 2026.