Twenty-five percent of bottled water is actually tap water that has been repackaged, according to a nutritionist who presented at the 11th annual American College of Sports Medicine Health & Fitness Summit last month.  In a recent study, many people said they drink bottled water because they believe it to be purer than tap water; however, on tests of 103 different bottled water brands, 22 percent were found to contain man-made chemicals, bacteria and arsenic.