4. Less Regulated
Although drinking water from the tap in the United States is regulated by the Environmental Protection Agency (EPA), bottled water is regulated by the Food and Drug Administration (FDA) which has less stringent criteria. The end result is that tap water is probably safer to drink than the bottled water found in the supermarket. If the quality or taste of your tap water is a concern, a high-quality filter will likely make it more safe to drink than bottled water.
