Does Aquafina Have Microplastics? Purified Isn't Plastic-Free (2026)

Last updated: July 15, 2026

Does Aquafina contain microplastics?

Yes. Aquafina was one of the eleven brands tested in the 2018 study led by Sherri Mason at SUNY Fredonia — still the only peer-reviewed study to name the brands it examined. Across all 259 bottles from all brands, 93% showed microplastic contamination, averaging about 325 particles per litre once the smallest fragments were counted.

The study reported per-brand averages only for the extremes — Nestlé Pure Life and Gerolsteiner were highest; San Pellegrino and Minalba lowest. Aquafina fell within the tested group but was not published as a named high or low, so we won't assign it a specific number. What the data supports is the category conclusion: contamination was near-universal, and no brand tested was clean.

Why “purified” doesn't mean plastic-free

Aquafina's selling point is that it starts as ordinary tap water and is then purified through reverse osmosis — the same process a home RO system uses. That removes dissolved minerals and contaminants and gives Aquafina its neutral taste. It does not remove the plastic problem, for two reasons.

First, the water is still bottled in PET plastic, which sheds microplastic particles — the 2024 PNAS study named PET as one of its two most common finds. Second, and less intuitively, the reverse-osmosis membrane is itself plastic. PNAS lead author Naixin Qian noted that much of the nanoplastic they detected appeared to come from the RO filter used in purification — and the single most common plastic they found was polyamide (nylon), a membrane material. In other words, the purification step that makes Aquafina taste clean is one of the sources adding nanoplastics.

Aquafina vs the alternatives

See how it stacks up against every major label in our bottled water brands ranked guide and the bottled water microplastic database. Curious how Aquafina compares to its main rival? Our Dasani audit covers the other big purified brand.

What to drink instead

• Recreate the purification at home. A reverse-osmosis or certified carbon-block filter gives you Aquafina's clean taste without the PET bottle.
• Switch the container. A glass or stainless bottle removes the single most controllable variable.
• Treat bottled as backup. Grabbing an Aquafina at the airport is fine; making it your household water supply is the expensive, higher-exposure choice.