What Is the Difference Between Soda Water and Carbonated Water

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Let’s start with the boss of bubbles: carbonated water. This is the umbrella term for any water that’s been jazzed up with carbon dioxide gas under pressure. Think seltzer, club soda, sparkling mineral water, and even that fancy Italian stuff you buy for €5.

Soda water is a specific type of carbonated water. It’s like saying "square" is a kind of rectangle. All soda water is carbonated, but not all carbonated water is soda water. Confused yet? Don’t be—this is the fun part.

The real difference? Ingredients, baby. Soda water usually has a pinch of sodium bicarbonate (baking soda) and often potassium sulfate or sodium chloride (salt) added. Why? To mimic the minerally taste of natural spring water. It’s fake-minerally, but don’t tell the hipsters.

Plain carbonated water—what we call seltzer in the US—is just water and CO2. Nothing else. Nada. It’s the pure, minimalist bubble. Soda water has that tiny, salty edge. Taste them side by side. You’ll notice soda water feels slightly rounder, a bit less sharp. Seltzer is like a crisp, rude slap. Soda water is a friendly pat on the back with a salt shaker hidden in its pocket.

Wait, So Is Club Soda the Same as Soda Water?

Oh, great question. You’re really digging now. Club soda and soda water are basically the same thing. Most bartenders use the names interchangeably. Club soda often has even more added minerals (like potassium bicarbonate and sodium citrate) for a slightly saltier, smoother fizz.

What Is Better: Soda Water Vs Sparkling Water?What Is Better: Soda Water Vs Sparkling Water?

But here’s the kicker: a tonic water is not in this family. Tonic has quinine and sugar (or high-fructose corn syrup). It’s sweet, bitter, and a whole different beast. Don’t confuse it. That’s how you end up with a G&T that tastes like a broken dream.

高橋 健太

高橋 健太

ライフスタイル編集者

Webメディアでの編集・執筆歴10年。読者の好奇心を刺激するストーリー作りを心がけています。

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