Some mineral waters had to be filtered due to bacterial or chemical contamination, a recent investigation revealed. But pesticide residues are found in tap water in certain regions.
Another health risk is the presence of plastic microparticles, coming from the degradation of the bottle. Nearly 80% of the bottles tested, as part of an experiment carried out in 2022 by the Agir pour l'Environnement association, contained microplastics. The long-term danger to human health is not yet known, but chronic exposure to these plastic fragments is suspected of having a chemical and mechanical impact.