For more than four decades, scientists have noticed a mysterious chemical in the treated drinking water of millions of people ...

A previously unidentified chemical has been discovered in the tap water of about one-third of U.S. homes, a new study has ...

A newly identified chemical byproduct may be present in drinking water in about a third of U.S. homes, a study found.

Some water systems decided to use chloramine -- a chemical compound formed by mixing chlorine and ammonia -- as a ...

Since the 1990s, many public systems have switched to inorganic chloramine, a chlorine derivative, to purify water supplies. Systems serving about 113 million people in the U.S. use this process.

An international team of researchers from the United States and Switzerland has identified chloronitramide anion as a ...

Researchers have identified a chemical in certain tap water across the United States, prompting questions about what it means ...

That byproduct has at last been identified, 40 years after it was first observed, but whether it’s dangerous remains an open ...