1. Alabama

Adam Yamaguchi reports on parts of the country where a basic sanitation infrastructure is out of reach for tens of thousands of residents forcing them to live near raw sewage.

2. New York

Adam Yamaguchi visits Mt. Vernon, N.Y., a town in the shadow of New York City, surrounded by wealth, and overwhelmed by a decrepit sewage system that threatens to swallow it whole.

3. Florida

Adam Yamaguchi reports from the Florida coasts, where breakneck development, climate change and too much waste are creating a perfect environmental storm.