Serra da Estrela is a still water from Portugal. Sodium-chloride type, very low mineralization. Brand page prints no units; mg/L assumed by convention. [SO4 not reported in the source data - defaulted to 0 here, not a measured zero.]
| Ion | mg/L |
|---|---|
| Calcium (Ca²⁺) | 0.9 |
| Magnesium (Mg²⁺) | 0.6 |
| Sodium (Na⁺) | 6.6 |
| Chloride (Cl⁻) | 8.2 |
| Sulfate (SO₄²⁻) | 0 |
| Bicarbonate (HCO₃⁻) | 5 |
| At a glance | |
|---|---|
| Total of these six minerals | 21.3 mg/L |
| Total hardness (as CaCO₃) | 4.7 mg/L |
| Alkalinity (as CaCO₃) | 4.1 mg/L |
| Sulfate-to-chloride ratio | – |
Mineral salts to dissolve in reverse-osmosis or distilled water, calculated by the BrewWaterSolver solver with the most common homebrew salts.
| Salt | 5 gal (18.9 L) | 20 L |
|---|---|---|
| Calcium chloride (CaCl₂) | 0.15 g | 0.16 g |
| Baking soda (NaHCO₃) | 0.08 g | 0.08 g |
The common salts reproduce every ion within 10%.
Serra da Estrela, nascente a 1200 m de altitude. Values from brand website.