At Lumenos we recently discussed the H20 issue of "Is bottled water really better"?
No. Whether for safety or health reasons, there is no reason to purchase bottled water over tap water.
Why?
Tap water from municipal water systems is closely monitored for a greater number of potential contaminants than bottled water is. Tap water falls under the jurisdiction of the Environmental Protection Administration (EPA) which specifies that water systems must regularly test specimens for over 100 biological, metal and other contaminants (for example see http://www.fcwa.org/water/water.htm for fairfax county water). Tap water must be tested over 100 times per month. Test results must be made public.
Bottled water falls under the Food and Drug Administration (FDA) which has lower standards and less enforcement authority - meaning fewer inspections if at all. The standards are lower and not as enforced as those by the EPA. Tests if done, do not have to be made public. And "fitness water"? Well, there's no evidence you need vitamins in your water (see DocTalk #2 on Healthy Nutrition) but even if you did, the levels in the bottle may not be too accurate becuase the FDA doesn't inspect it.
If you don't like the "taste" or "smell" of your tap water, a commercial filter may help but it won't likely make the water any "safer" . . as its already safe.
So as you hydrate this summer, you have many choices. But if you're into saving money, stick to the tap!
Have a great day.
Dr Mike -- a Lumen