Hacker News Reader

> The top 10 countries ... were Vietnam, Cambodia, China, Laos, Brazil, Argentina, Kuwait, Thailand, Indonesia and Portugal...

in many of those countries people drink bottled or purified (not surface) water.

The average person in most of those countries drinks tap water, either boiled or filtered to varying levels of efficiency.

In addition, fish are often caught in surface water, livestock may drink it, etc.

dude, you're right, my mistake. i was thinking of how i travel through those places.