Ja!
Ja! is Rewe’s budget own-brand still water, distributed through Rewe retail stores in Germany. The specific source is not publicly disclosed. The product appears in the database as a natural mineral water, though the classification field is inferred rather than confirmed from official documentation.
Mineral composition
| mg/L | |
|---|---|
| Calcium | 9 |
| Magnesium | 3 |
| Sodium | 98 |
| Sulfate | 40 |
| Chloride | 87 |
| Bicarbonate | 109 |
Compositions can vary by season and source. Read our methodology.
Mineral character
Calcium is 9.4 mg/L, magnesium 3 mg/L, sodium 97.7 mg/L, sulphate 40.1 mg/L, chloride 87.2 mg/L, and bicarbonate 109 mg/L. Hardness is 36 mg/L as CaCO₃. The most notable feature of this profile is the combination of very low hardness with very high sodium (97.7 mg/L) and chloride (87.2 mg/L), which is an atypical pattern for a German mineral water and should be noted by those on sodium-restricted diets. The source of this elevated sodium and chloride is unclear and is flagged in the research notes.
Use-case suitability
- CoffeeNot used in any current coffee recipe, but hardness 36 mg/L sits within the 9–266 mg/L range typical for these targets.
- TeaNot used in any current tea recipe. Hardness 36 mg/L is below the 37–59 mg/L range of these targets, useful as a diluent.
- BrewingNot used in any current brewing recipe, but hardness 36 mg/L sits within the 26–922 mg/L range typical for these targets.
- BakingNot used in any current baking recipe. Hardness 36 mg/L is below the 46–390 mg/L range of these targets, useful as a diluent.
- AquariumNot used in any current aquarium recipe, but hardness 36 mg/L sits within the 35–212 mg/L range typical for these targets.
- HorticultureNot used in any current horticulture recipe, but hardness 36 mg/L sits within the 12–54 mg/L range typical for these targets.
Where to buy
DE
Rewe
€0.20-0.30 per litre
Available through Rewe stores in Germany. As of March 2026.