The health department began deploying mobile air units Thursday provided by Pennsylvania’s Department of Environmental ...

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

Rescuers were continuing to search for one missing worker at the Clairton Coke Works more than five hours after mid-morning ...

Regulators are temporarily stepping up pollution monitoring in the Mon Valley after a deadly explosion at U.S. Steel’s ...

Allegheny County is increasing air quality monitoring after an explosion at a U.S. Steel plant south of Pittsburgh killed two ...

Family members tell Pittsburgh's Action News 4 Steven Menefee, a father of two, was a loving man who would give you the shirt ...

The air monitor generates a beam of infrared light, shoots it down to that mirror, which causes it to bounce back.

The potential pollution impact was mitigated because the weather cooperated, the Allegheny County Health Department said.

The Allegheny County Health Department issued an update on air quality near the U.S. Steel Clairton Coke Works following ...

The Allegheny County Health Department announced that Mobile Air Units will be deployed in the Mon Valley Thursday and Friday ...

Clairton, Pennsylvania was rocked Tuesday by an explosion at the U.S. Steel Clairton Coke Works. Clairton Mayor Richard ...

Two workers died and at least 10 people were injured after multiple explosions at the U.S. Steel Clairton plant.