Bottled Water vs. Tap Water: Can You Tell the Difference?

ABC News' Dr. Richard Besser challenged people to take the water challenge.
3:00 | 12/12/13

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Transcript for Bottled Water vs. Tap Water: Can You Tell the Difference?
next tonight, our real answers team is back because a big change is happening across america. Few of us are drinking soda and more people are turning to bottled water, but is bottled water better than tap, and can you really taste the difference in dr. Richard besser with a kind of water challenge. Reporter: The ads certainly make a splash. Crashing waterfalls, crystal clear lakes. We buy into it to the tune of $6 billion a year. Bottled water, is that true? Well, we asked. We set uple the real answers water challenge. Pitting new york h 2 o against bottled water. They didn't know what they were drinking but they knew what they thought. Tell me if you prefer the taste of a or b. I prefer b. What is it you like about a? Cleaner? Why do you like b more? Fresher. Reporter: Results in a minute. Do you think bottled water is better for mae wu says think again. We've done studies that show that bottled water is no more safe or clean than regular tap water. But there is more testing isn't there? There is more testing of tap water. Reporter: That's right. By federal rules they test tap water for more than 100 compounds every day. Bottled water doesn't have to do that though some claim they exceed federal requirements. Bottled water is a safe, healthy product. Consumers like the fresh taste. Reporter: Which brings us back to our taste result. The results. Almost a perfect split. Half of all bottled water including dasani and aquafina is tap water that's been purified. This new jersey mother of five buys cases a week. 5 $500 a year. I feel like I'm doing something healthy for my kids. Reporter: We gave the family the same taste test, water one or two. Two. Two. I would go with two. Reporter: You probably already guessed, the winner is GOOD OLD NEW JERo0 TAP WATER. Oh, my word. I'm going to save money. Reporter: Dr. Richard besser, abc news, new york.

This transcript has been automatically generated and may not be 100% accurate.

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