Every other Friday, the Outside/In team answers one listener question about the natural world. This week, Jeannie from Burlington, Vt., asked us about wastewater treatment plants. She said she's ...

Primary clarifier tanks sit at the Cedar Rapids Water Pollution Control Facility in Cedar Rapids on Nov. 4. The clarifier tanks allow large items in the water to settle at the bottom of the tank while ...

The City of Milwaukee has two water treatment plants that bring clean drinking water from Lake Michigan in the taps of 867,000 people, not just in Milwaukee, but in communities from Brown Deer to ...