One of the worst thing I did for many decades was drink bottled water and/or tap water. For many years I bought bottled water for home consumption. I eventually learned about under-sink reverse-osmosis water filtration systems and invested in one. For the last ~15 years, I've used such systems, following scheduled filter replacements. The water tastes and feels better than bottled water. Last year, my county water utility issued a boiled water alert due to high levels of e-coli. This wasn't a problem at all for me because of my water filtration system.