Kirkland (Costco)
Purified Water
StillUnited States
Kirkland is Costco’s private-label water brand, sold in bulk packaging through Costco warehouses in the United States. The product is purified water; mineral composition data is not published. The source water and purification process vary by regional production facility.
Mineral composition
| mg/L | |
|---|---|
| Calcium | awaiting data |
| Magnesium | awaiting data |
| Sodium | awaiting data |
| Sulfate | awaiting data |
| Chloride | awaiting data |
| Bicarbonate | awaiting data |
Mineral data incomplete — check the label for full composition.
Compositions can vary by season and source. Read our methodology.
Use-case suitability
- CoffeeProfile incomplete; suitability cannot be assessed.
- TeaProfile incomplete; suitability cannot be assessed.
- BrewingProfile incomplete; suitability cannot be assessed.
- BakingProfile incomplete; suitability cannot be assessed.
- AquariumProfile incomplete; suitability cannot be assessed.
- HorticultureProfile incomplete; suitability cannot be assessed.
Where to buy
US
Costco
$0.10-0.20 per litre
Available exclusively through Costco in the United States. As of March 2026.