I'd generally recommend avoiding tap water altogether in the U.S. and making sure you're not drinking fluoridated water. It's been show to decrease a child's IQ

I'd generally recommend avoiding tap water altogether in the U.S. and making sure you're not drinking fluoridated water. It's been show to decrease a child's IQ by up to 4 points when used by pregnant moms[1]. https://pubmed.ncbi.nlm.nih.gov/31424532/ https://pubmed.ncbi.nlm.nih.gov/31424532/