Made for travelers, by a traveler. For those backpacking situations where you end up in a new city you'd never heard of when you woke up.
Usually, we don't know if it's safe to drink the local tap water when traveling overseas. So often, we default to blindly buying bottled water. Use this site as a quick reference for tap water safety around the world. Use it to stay healthy, save a few bucks and do your part to protect our beautiful environment.
Just remember, the water ratings are not perfect. There are only about 1,500 cities listed, and the ratings are not live. So, it's best to always ask local people about any recent contaminations.