The company agreed to $2.7 million in fines and pollution upgrades estimated to cost $200 million. The deal does not affect lawsuit over pollution from Dec. 24 fire.
The $300,000 fine is for violations at the Clairton Coke Works during the first quarter of 2019. U.S. Steel has been fined a total of $2.6 million in the last year.
The company says improvements will reduce emissions and improve efficiency. Enviro groups say it doesn't address air pollution from the Clairton Coke Works.
The county is still not meeting federal air quality standards for particulate matter. The county's plan for dealing with the pollution must be submitted to US EPA for approval.
Pollution controls were off-line for over three months following a Christmas Eve fire. The lawsuit claims that at least 90,000 people were put at risk from toxic air pollution.
