pH comparison table
| Brand | Approx pH | Notes |
|---|---|---|
| Perrier | ~5.5 | High carbonation, lower pH |
| Topo Chico | ~5.7 | Strong fizz, mildly acidic |
| San Pellegrino | ~7.7 | High bicarbonate buffers acidity |
| Gerolsteiner | ~5.9 | High mineral content, naturally carbonated |
Sparkling Water pH Comparison
Dissolved CO₂ forms carbonic acid, which lowers a sparkling water’s pH. Here is how the major brands compare and what that pH actually means in practice.
Why carbonation affects pH
CO₂ dissolved in water becomes carbonic acid (H₂CO₃), which donates hydrogen ions and pushes pH downward. Higher dissolved CO₂ = lower pH, all else equal.
Does lower pH matter?
For healthy adults, sipping a pH-5.5 sparkling water has negligible systemic acid impact — saliva and stomach acid dominate. For dental enamel, frequent sipping of acidic drinks over hours is the bigger concern; drink with meals and rinse afterwards.
Bicarbonate buffers acidity
Mineral-rich waters like San Pellegrino and Gerolsteiner contain high bicarbonate, which partly neutralizes carbonic acid. That is why they read higher on pH despite being naturally sparkling.
Frequently asked questions
What is the pH of Perrier?
Perrier sits around pH 5.5 — mildly acidic due to its strong carbonation.
Is sparkling water bad for teeth?
Plain sparkling water is far less erosive than soda or juice. Risk rises with sugar or added citrus and with all-day sipping; drink with meals to limit exposure.
Which sparkling water has the highest pH?
San Pellegrino is among the highest-pH sparkling mineral waters at ~7.7, thanks to its very high bicarbonate.
