We’re on the hunt to find the best tap water in the world, and we need your help. We need user submitted water reviews based on your local tap water to help determine which city has the best water in the world. IF you want to help, next time you log on the the tapsafe.org, fill out the pop-up where you can review your local tap water and we will add it to our database. We then take the percentage of good or very good reviews, and use that to rank the cities. There is a minimum requirement of 10 reviews in order for a city to be listed..