5. Less Regulated
You expect the bottled water to be clean and safe since you expect it to be somehow better than tap water, but tap water in the United States is regulated by the Environmental Protection Agency (EPA) and bottled water is regulated by the Food and Drug Administration (FDA) which has less stringent criteria. This actually proves that tap water is probably safer to drink than the bottled water. If you are worried about the quality or taste of your tap water, then buy a high-quality filter to make your drinking water safer to drink than bottled water.