Aquafina and Sodium Bicarbonate: What You’re Really Drinking

The Label Tells a Quiet Story

Cracking open a bottle of Aquafina, you don’t really think about what goes into it, apart from water. Still, flip the label and there’s a list of “added minerals for taste.” Sodium bicarbonate usually lands there, just below the more common culprits like magnesium sulfate. So, yeah—PepsiCo puts a small amount of sodium bicarbonate into Aquafina.

Why Bother With Minerals in Bottled Water?

After years of drinking public tap water, water out of my hiking bladder, or from a basic home filter, bottled water seemed like overkill. But big brands like Aquafina strip roughly everything out of their municipal source and then add back a “taste profile.” This process, called reverse osmosis, removes solids, impurities, and natural minerals. To avoid a flat taste, companies bring minerals like sodium bicarbonate back to the table.

Sodium bicarbonate shows up under other names—baking soda, bread leavener, that box in your fridge keeping smells at bay. In bottled water, it behaves a lot more subtly. Once it meets water, it helps smooth out sharpness and brings pH into a range most folks find pleasant.

Health and Hydration: Salt By Another Name?

Some people see the word “sodium” and worry about hidden salt loads lurking in their water. Most sources, including labeling disclosures and independent studies, show Aquafina’s added sodium doesn’t even reach one milligram per serving—a fraction of what you’d get from a slice of bread. The FDA actually allows up to 20 mg per serving before something gets labeled “very low sodium.” Aquafina’s sodium content stays well under that.

The rationale for adding sodium bicarbonate isn’t just flavor. It helps stabilize shelf life, which matters for any bottled product stuck in warehouses or trucks. It’s also handy for regulating acidity, reducing the risk of metals leaching from the bottling equipment.

Is This a Problem for Consumers?

For the average healthy person, the low dose of sodium bicarbonate in Aquafina doesn’t present any risk, nor does it tip the daily sodium scale. People following restrictive low-sodium diets, those with certain kidney issues, or hypertension will want all sources counted, but a bottle here or there won’t likely matter. On the other hand, the near-total lack of flavor in pure distilled water makes this tiny addition taste less clinical—something I’ve noticed when comparing brands on long road trips.

There’s a bigger picture: confusion about added minerals stems from weak labeling standards. As of last year, regulations still let brands use catch-all language for “minerals added for taste.” That doesn’t empower consumers. Transparency would fix a lot. If every bottle spelled out exactly what minerals and how much, buyers could make choices fitting their goals.

Better Bottled Water Choices Start with the Label

Aquafina and competitors know most people just want convenience with their water. But as demand grows and people start asking questions about their food and drink, brands who step up their labeling game will probably win trust. I keep an eye on labels now, especially for anything that I drink daily. Knowing about things like sodium bicarbonate makes it easier to decide what works for me, without the mystery.

Solutions Worth Drinking In

Clearer labeling, plain language, and precise amounts listed—those would go a long way. For now, Aquafina includes sodium bicarbonate as part of its mineral formula, but in amounts too tiny to bother most people. If you’re looking for pure H₂O with zero additives, distilled or deionized options can meet that need. For most, a touch of sodium bicarbonate just means your water tastes a bit better—and lasts a little longer.