Researchers have found several hundred different chemical substances in tap water stored in reusable plastic bottles. Several of these substances are potentially harmful to human health. There is a need for better regulation and manufacturing standards for manufacturers, according to the chemists behind the study.
https://www.sciencedaily.com/releases/2022/02/220211102618.htm
I recently watched a Youtube video by a scientist in this context. I can also highly recommend it: