What is the pH level of sparkling mineral water?
Sparkling mineral water is usually slightly acidic, with a pH around 5 to 5.5. A published survey of 32 carbonated bottled waters measured an average pH of 5.46, with a range from 4.22 to 6.51. Flavored sparkling waters with added acid are more acidic.
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In this article
What is the pH of sparkling mineral water?
In a study of bottled waters sold in Portugal, 32 carbonated brands (160 bottles) had pH values between 4.22 and 6.51, with an average of 5.46. Still waters in the same study (73 brands) averaged 6.81, ranging from 5.02 to 9.61. Neutral is pH 7, so sparkling water is mildly acidic, still water is close to neutral on average.
Why is sparkling water acidic?
Dissolved carbon dioxide forms a weak acid (carbonic acid). The more CO2 in the water, the lower the pH tends to be. When a bottle goes flat, pH rises. Mineral content also differs by brand, so exact numbers differ, so there is no single figure.
| Water type | pH range in the study | Average |
|---|---|---|
| Carbonated (32 brands) | 4.22 to 6.51 | 5.46 |
| Still (73 brands) | 5.02 to 9.61 | 6.81 |
Is sparkling mineral water bad for teeth?
The American Dental Association says any drink with carbonation has a higher acid level, but in a study on donated teeth, sparkling water affected enamel about as much as regular water. It adds that citrus-flavored waters often have higher acid levels and do raise the risk of enamel damage, and that sparkling water with added sugar can contribute to cavities. Its best choice is plain fluoridated water. In the Portuguese study, 10 of 32 carbonated brands had an average pH under 5.2, which the authors used as an enamel threshold, so some waters do sit lower.
How to check your own water
- Look for a pH value or analysis on the label (some European mineral waters print one).
- Plain mineral water is usually less acidic than flavored sparkling water or soda.
- Pick plain, unsweetened water and drink it in one sitting rather than sipping all day.
People also ask
Is sparkling mineral water acidic or alkaline?
Mildly acidic. The average of 32 carbonated waters in one study was pH 5.46, below neutral 7.
Does sparkling water have a lower pH than still water?
Yes, on average: 5.46 versus 6.81 in the same study, though some still waters were also acidic.
Is sparkling water bad for your teeth?
The ADA says plain sparkling water is far better than sugary drinks, but citrus-flavored and sweetened versions raise the risk of enamel damage.
Sources
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