EPA Finalizes Steel Factory Air Pollution Maintenance Rules
Published Date: 12/3/2025
Rule
Summary
The EPA is finalizing updated rules for iron and steel factories to control harmful air pollution. These changes mainly adjust deadlines for certain equipment checks and monitoring, helping factories stay cleaner without extra delays. The new rules take effect December 3, 2025, and affect all integrated iron and steel manufacturers aiming to meet safer air standards.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Compliance Deadlines Pushed to April 3, 2027
The EPA reaffirmed revised compliance deadlines to April 3, 2027 for several II&S NESHAP requirements, including opacity limits for planned bleeder valve openings, work practices for bell leaks and beaching, monitoring frequency for blast furnaces and basic oxygen process furnaces, limits for unplanned bleeder valve openings, opacity limits for slag processing/handling/storage, and fenceline monitoring (fenceline monitoring due one year after EPA-approved method or April 3, 2027, whichever is later). The final rule is effective December 3, 2025.
No Significant Small Business Impact
The EPA certified under the Regulatory Flexibility Act that this action will not have a significant economic impact on a substantial number of small entities. The rule notes there are only eight integrated iron and steel manufacturing facilities in the United States, owned by two parent companies that do not meet the Small Business Administration's definition of small businesses.
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