Category comparison
Mineral Water vs Club Soda
Mineral water, club soda, seltzer and tonic water all bubble in the glass, but they're four different products. The differences come down to source, added minerals and added sugar.
Mineral water
Sourced from a protected aquifer, naturally rich in minerals, and either naturally or artificially carbonated. Nothing is added except (sometimes) CO2.
Club soda
Carbonated purified water with added mineral-like salts — typically sodium bicarbonate, potassium sulfate or sodium citrate — for a slightly salty, mineral-flavored taste. The minerals are added at the bottling plant, not sourced naturally.
Seltzer
Carbonated water with nothing added. No minerals, no salts, no flavors. The blank-canvas option behind most flavored sparkling waters like LaCroix and Waterloo.
Tonic water
Carbonated water with added quinine and, in most cases, significant sugar (often as much per ounce as soda). Not a healthy substitute for sparkling water.
Frequently asked questions
Can I substitute club soda for mineral water in cocktails?
Yes — club soda's added salts give it a similar mouthfeel to many mineral waters. For straight drinking, mineral water tastes more natural.
Does club soda count as mineral water?
No — its minerals are added, not naturally present from a source. It cannot legally be labeled mineral water in the U.S. or EU.
Instant PDF. Every major brand ranked by pH, minerals, source and taste.
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