If it is ‘treated’ tap water though, doesn’t this mean it’s better? Not really, according to a 2008 study by the Environmental Working Group. They found that bottled water had the same contaminants as tap water. Also, in the U.S, U.K, and Canada, tap water has stricter health standards than bottled water, so bottled water may be even unhealthier. Lastly, regarding taste, countless blind taste tests (one conducted by the New York Times) have shown that tap water was equal or better tasting to consumers.