A previously unidentified chemical has been discovered in the tap water of about one-third of U.S. homes, a new study has found, and scientists are actively investigating whether it's toxic. The ...

Increasing testing for PFAS is part of the UK's first ever national plan for tackling the substances.

Editor's Note: A previous version of this story incorrectly stated that the list of foods contained the highest concentration of perchlorate but these foods were just tested for the presence of ...

The Pa. Dept. of Environmental Protection is asking for funding from the state’s next fiscal budget for new water testing equipment. In this file photo, a water researcher tests a sample of water for ...