Bottled water does not have to be regulated in any way, not by the city, state or the FDA. Water that comes out of you tap is regulated by the state you live in and has federal standards they must meet. That being said bottled water could be from a river with a deer pissing upstream but as long as it taste good and makes no one sick its ok, so city water is definately safer though it may not taste as well. Now if you have a city thats water supply is from a deep well ( such as mine) the water taste great and requires little treatment, but if you have a city that gets its water from a surface supply its very likely that it taste like ass.