In Cary, NC, tap water costs about a penny per gallon. So that’s 1/8th of a cent per 16-ounce serving. The cheapest bottled water at BJ’s (a giant warehouse store with bulk pricing) is 15 cents per 16-ounce bottle. So bottled water costs 120 times more than tap water in the best case. If you pay $2 for a bottle of water at the airport, then bottled water is 1,600 times more expensive than tap water. And at the airport you drink from the drinking fountain for free.
Note that if you drink tap water at home, you also need to consider the cost of the cup or container, and the cost of cleaning the cup or container for reuse. So the 10,0000 estimate in infographic sounds high. But there can still be a pretty big difference in price between bottled water and tap water.
Penn & Teller (below) note that Americans spend $4 billion per year on bottled water."
