Still Water vs Sparkling Water: What's the Difference?

Quick answer: Still water and sparkling water hydrate you equally well — the only real difference is carbonation. Sparkling water is still water with added carbon dioxide, which creates the bubbles and a slightly tangy taste. Choose based on preference, not hydration.

What actually separates them

Still water is plain water with no added gas. Sparkling water has carbon dioxide dissolved into it under pressure, which forms carbonic acid and the fizz you feel. That is the entire difference in substance.

Do they hydrate differently?

No. Despite the myth, carbonation does not meaningfully reduce hydration. Both still and sparkling water count toward your daily fluid intake. Sparkling can even help some people drink more because they enjoy it.

Health and teeth

Plain sparkling water (no added sugar or citric acid) is a healthy choice. It is mildly acidic, so it is gentler on teeth than soda or flavored seltzers but slightly more acidic than still water. For most people this is not a concern; drinking it with meals minimizes any effect.

When to choose each

Pick still for everyday, high-volume hydration — workouts, all-day sipping. Pick sparkling when you want something more interesting than plain water or a soda replacement. NEA offers both in 16.9 fl oz plastic-free aluminum cans, so you can match the moment without touching a plastic bottle.

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Frequently asked questions

Is sparkling water as hydrating as still water?

Yes. Carbonation does not significantly affect hydration — both still and sparkling water count toward your daily fluid needs.

Is sparkling water bad for you?

Plain sparkling water with no added sugar or acids is a healthy choice. It is slightly acidic, so enjoy it with meals if you are concerned about tooth enamel.

What is the difference between sparkling water and still water?

Sparkling water is still water with carbon dioxide dissolved into it to create bubbles. Otherwise they are the same water.