"As an American -- like, water? There's the kitchen sink, the bathroom sink -- you know -- there's water."
"Every 20 seconds a little kid, a child dies because they lack access to clean water and sanitation. Every 20 seconds."
Damon, father of four daughters, says, "Once you have kids it's impossible not to see their face in every child you see."
What was truly horrifying for Damon and Water.org's co-founder, Gary White, was how preventable water-related deaths can be.
"We've solved this in the West for 100 years," he says referring to the worldwide water and sanitation crisis. "You know, imagine if we cure cancer tomorrow and in 100 years, three-and-a-half million people a year are still dying of it. I mean it's just unconscionable."
So, Damon decided to use his fame to help.
"If cameras were going to follow us around, why not make something good out of that?"
In 2006, Damon co-founded H2O Africa Foundation, which served to bring attention to clean water initiatives in Africa.