Do bottled water brands contain endocrine disruptors?

What's actually in it

Bottled water sits inside plastic or glass for weeks or months before you drink it. During that time, chemicals from the bottle migrate into the water. The main concerns are bisphenols (BPA, BPS, BPF), phthalates, and nonylphenol. All of these are endocrine disruptors that mimic or block your hormones.

Plastic bottles made from PET (polyethylene terephthalate) are the most common type on store shelves. PET releases more chemicals when it sits in warm environments like warehouses, delivery trucks, or your car.

What the research says

A 2026 study in Anal Chim Acta tested dozens of bottled water brands for endocrine disruptors. They checked how the bottle material, water source, and retail price affected contamination levels.

Water in plastic bottles had higher levels of bisphenols and phthalates than water in glass bottles. The differences were clear and consistent across brands.

Cheaper bottled water tended to have higher chemical levels than premium brands, likely because cheaper bottles use thinner plastic and spend more time in uncontrolled storage conditions.

The source of the water mattered too. Spring water and mineral water had different contamination profiles, but the bottle material was the biggest factor. Even "purified" water picked up chemicals from its container during storage.