EPA Reviews and Updates U.S. Steel Clairton Plant Air Permit
Published Date: 11/20/2025
Notice
Summary
The EPA reviewed a request from United States Steel about their Clairton plant’s air pollution permit and decided to agree with some concerns but not all. This means the plant must follow updated rules to keep the air cleaner, with some changes happening soon. If anyone wants to challenge the decision, they have until January 20, 2026, to take it to court.
Analyzed Economic Effects
2 provisions identified: 0 benefits, 1 costs, 1 mixed.
EPA Partially Grants US Steel Petition
On September 16, 2025, the EPA Administrator issued an order that granted in part and denied in part United States Steel Corporation's November 19, 2024 petition to object to Clean Air Act Title V operating permit no. 0052-OP22. The permit at issue is for the Mon Valley Works, Clairton by-products coke plant in Clairton, Allegheny County, Pennsylvania, and the EPA order explains the basis for the decision and is available in the EPA Title V petition database.
Deadline to Seek Judicial Review
Sections 307(b) and 505(b)(2) of the Clean Air Act allow a petitioner to seek judicial review of portions of the EPA order that denied issues. Any petition for review must be filed in the United States Court of Appeals for the appropriate circuit no later than January 20, 2026.
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