Aquafina is safe drinking water that meets federal standards, but it’s essentially ultra-purified tap water with almost nothing in it. Its purification process removes contaminants effectively, yet it also strips out every mineral your body could use. Whether that makes it “good” depends on what you’re looking for: clean hydration with a neutral taste, or water that contributes to your daily mineral intake.
Where Aquafina Actually Comes From
Aquafina starts as municipal tap water, the same water that flows from public water systems regulated by the EPA. PepsiCo, which owns the brand, states this plainly on its website: “Aquafina originates from public water sources and is then purified through a rigorous purification process.” This isn’t unusual. Dasani (owned by Coca-Cola) and several other major brands do the same thing. The difference between Aquafina and your kitchen faucet is what happens after the water leaves the municipal supply.
How It’s Purified
Aquafina uses a seven-stage system called HydRO-7 that combines prefiltration, reverse osmosis, UV treatment, ozone disinfection, activated carbon filtering, and multiple polishing stages. Reverse osmosis is the heavy lifter here. It forces water through a membrane under pressure, stripping out dissolved solids, organic matter, and trace contaminants. The additional stages catch anything reverse osmosis misses and disinfect the water before bottling.
The result is extremely clean water. Aquafina’s 2025 water quality report shows nearly every tested contaminant listed as “ND,” meaning not detected. That includes lead, arsenic, mercury, fluoride, and 20 other inorganic compounds. Total dissolved solids come in below 10 parts per million, which is the FDA’s threshold for labeling water as “purified.” For context, typical tap water in the U.S. ranges from about 50 to 500 ppm.
What’s Missing: Minerals
The tradeoff of aggressive purification is that Aquafina contains virtually no minerals. Calcium, magnesium, and other electrolytes that occur naturally in most water sources are removed during reverse osmosis, and Aquafina doesn’t add any of them back. This is one of the clearest differences between Aquafina and its competitors.
Dasani, for example, also uses reverse osmosis but adds back a blend of magnesium sulfate, potassium chloride, and sodium. Smartwater adds electrolytes after distillation. Aquafina skips this step entirely, which gives it a very flat, neutral taste that some people prefer and others find bland.
From a health standpoint, the minerals in bottled water contribute only a small fraction of your daily needs. You get far more calcium and magnesium from food. But if you drink mostly bottled water and eat a diet low in mineral-rich foods, choosing water with zero mineral content means you’re missing one more potential source.
pH and Acidity
Aquafina tests acidic, with a pH below the neutral mark of 7. This is typical of reverse osmosis water because removing dissolved minerals lowers pH. Some wellness claims suggest that acidic water is harmful, but your body tightly regulates its own blood pH regardless of what you drink. The acidity of Aquafina is comparable to coffee or orange juice and poses no meaningful health risk. If you have concerns about tooth enamel, the acidity level in purified water is far lower than in sodas or citrus drinks.
Microplastics
A study published in the journal Frontiers in Chemistry tested 11 major bottled water brands for microplastic contamination. Aquafina samples contained an average of 174 to 252 microplastic particles per liter, with some individual bottles testing as high as 1,295 particles per liter. These are tiny fragments of synthetic polymer, mostly smaller than 100 micrometers.
This isn’t unique to Aquafina. The study found microplastics across nearly every brand tested, and the contamination likely comes from the plastic bottles and caps themselves, not from the purification process. The long-term health effects of ingesting microplastics are still being studied, but this is a consideration for anyone drinking bottled water regularly, not just Aquafina specifically.
How It Compares to Other Brands
- Dasani: Same reverse osmosis base, but adds minerals back for taste. Slightly higher TDS and a less “empty” flavor profile.
- Smartwater: Distilled from municipal sources, then enhanced with electrolytes. Marketed as premium but owned by the same parent company as Dasani.
- Spring water brands (Poland Spring, Evian, Fiji): Sourced from natural springs rather than municipal systems, retaining naturally occurring minerals. Generally higher in TDS and mineral content.
Aquafina sits at the most stripped-down end of the spectrum. It’s the purest in terms of what’s been removed, but that also makes it the least mineral-rich option on the shelf.
The Bottle Itself
PepsiCo now makes Aquafina bottles from 100% recycled plastic (rPET), excluding the cap and label. The company has also pledged to use 50% recycled plastic across all its beverage bottles by 2030. If environmental impact factors into your decision, this puts Aquafina ahead of brands still using virgin plastic, though reusable bottles filled with filtered tap water remain the lower-impact choice by a wide margin.
Is It Worth Buying?
Aquafina is clean, safe water that passes every regulatory standard. If you want the most neutral-tasting bottled water with minimal additives, it delivers exactly that. The downsides are practical: you’re paying a premium for purified municipal water you could roughly replicate at home with a reverse osmosis filter, and you’re getting zero minerals in return. For occasional use or situations where tap water isn’t available, it’s a perfectly fine choice. As your primary water source, a mineral water or filtered tap water would give you the same hydration with a nutritional edge.