No longer sold under this name as far as we can find. A search of Sainsbury’s site on 13 October 2026 returns only “British Bottled Spring Water”. We don’t know when the name changed. Correction: this page used to call the water ultra-soft (TDS 22 mg/L). We have no verified analysis for the old product.
Replaced by Sainsbury’s British Bottled Spring Water Still Spring Water
Sainsbury’s Castle Spring
British Still Spring Water
Not sold under this name on Sainsbury’s website (13 October 2026). Its own-label still spring water is now “British Bottled Spring Water”.
Sainsbury’s Castle Spring was Sainsbury’s own-label still spring water. It is not the Castle Spring on Defra’s register of natural mineral waters, a source at Lon Parcwr, Ruthin, Denbighshire, recognised in 1993. We found no link between the two.
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.