A Mobile Air Unit provided by the Pennsylvania Department of Environmental Protection and Carnegie Mellon University made several stops in the Mon Valley Thursday and Friday, monitoring the air ...

The fatal explosion last week at U.S. Steel's Pittsburgh-area coal-processing plant has revived debate about its future just ...

The fatal explosion last week at U.S. Steel’s Pittsburgh-area coal-processing plant has revived debate about its future just as the iconic American company was emerging from a long p ...

A deadly explosion at U.S. Steel’s Clairton Coke Works near Pittsburgh has killed two workers and injured ten others after a ...

KDKA's Megan Shinn takes a look back at the news of the week, including the explosion at the U.S. Steel Clairton plant, the ...

In the last five years, U.S. Steel has paid more than $10 million in penalties for violations of the Clean Air Act at ...