Luso
Luso is a natural mineral water from Luso, a spa town in the municipality of Mealhada, Aveiro, in the Beira Litoral region of Portugal. The spring has been in therapeutic use since the 18th century and the Luso brand has been commercially bottled since the mid-20th century. The brand is owned by Unicer (Super Bock Group).
Mineral composition
| mg/L | |
|---|---|
| Calcium | 1 |
| Magnesium | 2 |
| Sodium | 7 |
| Sulfate | 2 |
| Chloride | 9 |
| Bicarbonate | 13 |
Compositions can vary by season and source. Read our methodology.
Mineral character
Luso is one of the most lightly mineralised waters in the TWD database. Calcium is 0.75 mg/L, magnesium 1.7 mg/L, sodium 7.3 mg/L, sulphate 1.5 mg/L, chloride 9 mg/L, and bicarbonate 13 mg/L. Hardness is 9 mg/L as CaCO₃ and TDS is below 50 mg/L. The near-zero calcium and bicarbonate are consistent with granitic geology. The brand is approved for infant use under Portuguese classification.
Use-case suitability
- CoffeeNot used in any current coffee recipe, but hardness 9 mg/L sits within the 9–266 mg/L range typical for these targets.
- TeaNot used in any current tea recipe. Hardness 9 mg/L is below the 37–59 mg/L range of these targets, useful as a diluent.
- BrewingNot used in any current brewing recipe. Hardness 9 mg/L is below the 26–922 mg/L range of these targets, useful as a diluent.
- BakingNot used in any current baking recipe. Hardness 9 mg/L is below the 46–390 mg/L range of these targets, useful as a diluent.
- AquariumNot used in any current aquarium recipe. Hardness 9 mg/L is below the 35–212 mg/L range of these targets, useful as a diluent.
- HorticultureNot used in any current horticulture recipe. Hardness 9 mg/L is below the 12–54 mg/L range of these targets, useful as a diluent.
Where to buy
PT
Continente, Pingo Doce, Auchan PT
€0.15 per litre
Available in Portugal. As of March 2026.