Contaminated tap water could lead to 100,000 cases of cancer in the US if people drink it their whole lives. Here's how worried you should be.

A study from the nonprofit Environmental Working Group found that contaminants in US drinking water could lead to nearly 100,000 cases of cancer among people…

Read More Contaminated tap water could lead to 100,000 cases of cancer in the US if people drink it their whole lives. Here's how worried you should be.