Auchan is a still water from France. Calcium-bicarbonate type, low mineralization. [Cl not reported in the source data - defaulted to 0 here, not a measured zero.]
| Ion | mg/L |
|---|---|
| Calcium (Ca²⁺) | 66 |
| Magnesium (Mg²⁺) | 11 |
| Sodium (Na⁺) | 1.4 |
| Chloride (Cl⁻) | 0 |
| Sulfate (SO₄²⁻) | 59 |
| Bicarbonate (HCO₃⁻) | 173 |
| At a glance | |
|---|---|
| Total of these six minerals | 310.4 mg/L |
| Total hardness (as CaCO₃) | 210.1 mg/L |
| Alkalinity (as CaCO₃) | 141.9 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 |
|---|---|---|
| Gypsum (CaSO₄) | 0.62 g | 0.66 g |
| Epsom salt (MgSO₄) | 1.92 g | 2.03 g |
| Chalk (CaCO₃) | 2.63 g | 2.78 g |
The common salts reproduce every ion within 10%.
Chalk (CaCO₃) doesn't dissolve well directly in mash or sparge water without dissolved CO₂ - slurry it in carbonated water (e.g. sparkling water) before adding it, rather than mixing it into still water or sprinkling it in dry, or the calculated amount may not fully dissolve. How to dissolve chalk with CO₂
Roche des Ecrins (named in legal denomination). Values from official label/spec sheet reproduced by a retailer or distributor.