Bottled water or tap water? Here’s what the science says
Related: You're not cleaning your water bottle enough
Marketing portrays bottled water as purer and healthier, but scientific studies indicate it can contain contaminants like bacteria, microplastics, and leached chemicals, posing potential health risks.
In most developed countries, tap water is subject to stricter legal and testing standards, with daily monitoring for contaminants, unlike bottled water, which is regulated as a packaged food product and tested less frequently.
Plastic bottles can leach endocrine-disrupting chemicals such as antimony, phthalates, and bisphenol analogues, particularly when exposed to warmth, with potential long-term health implications currently under research.
The environmental impact of bottled water is significant, with global consumption leading to vast plastic waste, high energy usage (up to 2,000 times more than tap water), and a larger carbon footprint.
While essential in emergencies, bottled water is generally not safer or cleaner than tap water in developed nations, highlighting the importance of understanding these differences amid growing global water stress.