Tap water generally contains metals such as copper and lead from the piping it goes through to get to your faucet, and the idea behind bottled water is that it does not contain these metals. Bottled water is supposed to be pure, lacking any metal impurities, but many companies do not meet these standards. Find a major brand that fits your price range and stick with it. Bottled water is not really any safer to drink than tap water is. The EPA sets standards for all tap water, which makes it completely safe to drink, although it does have chemicals that have treated it. Yes. Because of no chloride in and the multiple filtering of bottled water it is much safer than tap water.