The case heard Wednesday could put a rule on hold that reduces smog-forming pollution from states like Ohio that wafts downwind to states like Pennsylvania.
How the latest news about a new soot standard, a settlement with U.S. Steel and EPA's rejection of the company's air permit could impact Pittsburgh's air.
EPA has ordered Allegheny County to revise its air permit for U.S. Steel’s Edgar Thomson plant to include stronger testing and monitoring requirements.
Five Pa. school districts including Pittsburgh, will receive 120 clean energy school buses through federal grants, helping to phase out diesel engines and reduce health risks.
The county found the company’s Clairton coke works caused hydrogen sulfide levels at the nearby air monitor to surpass standards 159 times between March 2022 and November 2023.
