There are hundreds, if not thousands, of chemicals at well exceeding the guidelines EWG recommends linked to cancer, infertility, heart disease, just about every disease today. Heavy metals, like lead. Pharmaceuticals that you pee out are recycled back into the water supply. So, there's birth control; there's SSRIs. There's pesticides in the tap water. It is truly one of the worst cocktails you could be putting in your body.