Does bottled mineral water contain bisphenols and phthalates from the plastic bottle?

What's actually in it

Bottled mineral water sits in a PET plastic bottle from the moment it's filled at the spring until you drink it weeks or months later. PET plastic contains chemical additives that slowly migrate into the water. The bottles also pick up contamination during manufacturing. The result: your "pure mountain spring water" contains traces of industrial chemicals.

What the research says

A 2026 study in Environ Toxicol tested bottled mineral water brands and found something most people wouldn't expect: the water contained both bisphenols and phthalates at the same time. This was the first study to document both types of chemicals occurring together in bottled mineral water.

The researchers didn't just measure the chemicals. They tested whether the water had estrogenic activity, meaning the ability to mimic the hormone estrogen in the body. It did. The combination of bisphenols and phthalates together created a hormonal effect that was measurable in lab assays.

Bisphenols like BPA and BPS mess with your endocrine system. Phthalates do the same. When you get both at once, the effects can stack. This matters because most safety testing looks at one chemical at a time, not the cocktail you actually swallow.

Storage conditions made things worse. Bottles stored in warm conditions or exposed to sunlight leached more chemicals. If your case of water sat in a hot warehouse before it reached the store shelf, the contamination levels are higher than what you'd find in a freshly bottled product.