In the United States, we take clean water for granted. You turn on the tap, out comes clean water, right? As we find in our second episode of Our America: Trouble on Tap, not necessarily. According to the Environmental Protection Agency, there are an estimated 6-10 million lead service lines (the water pipe that brings water from the city’s water main into your house) in the U.S. And according to the Natural Resources Defense Council, there are 150 million plus people are getting water for a utility that has found lead in the water. Watch "Our America: Trouble On Tap - America’s Lead Problem" beginning September 29 wherever you stream ABC.