Eska
Eska is a spring water bottled from an esker aquifer in Quebec, Canada. An esker is a glacially formed ridge of stratified sand and gravel through which meltwater percolates slowly; this type of formation provides natural filtration and is the basis for Eska’s positioning as a glacially filtered water.
Mineral composition
| mg/L | |
|---|---|
| Calcium | 24 |
| Magnesium | 4 |
| Sodium | 3 |
| Sulfate | 8 |
| Chloride | 1 |
| Bicarbonate | 86 |
Compositions can vary by season and source. Read our methodology.
Mineral character
Calcium is 24 mg/L, magnesium 4 mg/L, sodium 2.5 mg/L, sulphate 7.5 mg/L, chloride 0.5 mg/L, and bicarbonate 86 mg/L. Hardness is 76 mg/L as CaCO₃ and TDS is approximately 85 mg/L. The profile is soft, with low sodium (2.5 mg/L) and very low chloride (0.5 mg/L), consistent with glacial siliceous geology with limited evaporite contact.
Use-case suitability
- CoffeeNot used in any current coffee recipe, but hardness 76 mg/L sits within the 9–266 mg/L range typical for these targets.
- TeaNot used in any current tea recipe. Hardness 76 mg/L is above the 37–59 mg/L range of these targets.
- BrewingNot used in any current brewing recipe, but hardness 76 mg/L sits within the 26–922 mg/L range typical for these targets.
- BakingNot used in any current baking recipe, but hardness 76 mg/L sits within the 46–390 mg/L range typical for these targets.
- AquariumNot used in any current aquarium recipe, but hardness 76 mg/L sits within the 35–212 mg/L range typical for these targets.
- HorticultureNot used in any current horticulture recipe. Hardness 76 mg/L is above the 12–54 mg/L range of these targets.
Where to buy
CA
Loblaws, Sobeys, Metro
CA$0.60-1.00 per litre
Available in Canada. As of March 2026.