https://www.sfgate.com/local/article/best-tap-water-us-california-sf-hetch-hetchy-16230738.php#:~:text=The%20Metropolitan%20Water%20District%20of,Ana%2C%20California%2C%20took%20second.
"Nine judges spent hours tasting and selecting from waters sourced in 19 states, three Canadian provinces and 14 foreign countries. They were instructed by von Wiesenberger to look at, sniff and taste each water under guidelines similar to those in a wine tasting, said Berkeley Springs in a statement. .."