WTO notification · TBT
United StatesAdopted, according to its latest notice
Official title
National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review
The United States issued an addendum on 5 December 2025 to the earlier TBT notification G/TBT/N/USA/2026. Addenda often report that a measure was adopted, changed, postponed or withdrawn. The measure was first notified on 2 August 2023. The comment period closed on 2 October 2025.
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Hazardous air pollutants from blast furnace (BF) stoves and basic oxygen process furnaces (BOPFs); Product and company certification. Conformity assessment; Environmental protection; Air quality; Environmental testing (ICS code(s)
Latest notice (G/TBT/N/USA/2026/Add.6, 5 December 2025)
The latest notice says the measure was adopted or published.
National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review
The U.S. Environmental Protection Agency (EPA or Agency) is taking final action to respond to comments on an interim final rule (IFR) related to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Integrated Iron and Steel Manufacturing Facilities (''II&S NESHAP''). Specifically, the EPA is responding to comments on the IFR published in the Federal Register on 3 July 2025 (notified as G/TBT/N/USA/2026/Add.4), that revised compliance deadlines for certain provisions related to planned bleeder valve openings, unplanned bleeder valve openings, blast furnace (BF) casthouses, basic oxygen process furnace (BOPF) shops, slag processing and handling, beaching, and fenceline monitoring. After carefully considering the comments, the EPA concludes that the amendments made in the IFR are warranted and is not making any further changes to the compliance deadlines revised in the IFR. This final rule is effective on 3 December 2025. 90 Federal Register (FR) 55681, 3 December 2025; Title 40 Code of Federal Regulations (CFR) Part 63: This final rule and previous actions notified under the symbol G/TBT/N/USA/2026 are identified by Docket Number EPA-HQ-OAR-2002-0083. The Docket Folder is available from Regulations.gov at and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number.
Proposed rule - The U.S. Environmental Protection Agency (EPA) is proposing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Integrated Iron and Steel Manufacturing Facilities, as required by the Clean Air Act (CAA). To complete the required CAA section 112(d)(6) technology review promulgated on 13 July 2020, the EPA is proposing standards to regulate HAP emissions from five unmeasured fugitive and intermittent particulate (UFIP) sources, some of which are also referred to as 'fugitive' sources, that are currently not regulated by the NESHAP, as follows: Bell Leaks, Unplanned Bleeder Valve Openings, Planned Bleeder Valve Openings, Slag Pits, and Beaching. Also, for sinter plants we are proposing standards for the following five currently unregulated HAP: carbonyl sulfide (COS), carbon disulfide (CS2), mercury (Hg), hydrochloric acid (HCl), and hydrogen fluoride (HF); for blast furnace (BF) stoves and basic oxygen process furnaces (BOPFs), we are proposing standards for the following three unregulated pollutants: total hydrocarbons (THC), HCl, and dioxins/furans (D/F); and for BFs, we are proposing standards for the following two unregulated pollutants: THC and HCl. As an update to the technology review, we are proposing to revise the current BOPF shop fugitive 20 percent opacity limit to a 5 percent opacity limit and require specific work practices; revise the current BF casthouse fugitive 20 percent opacity limit to a 5 percent…
Every notice about this measure published here, newest first. Each one is the notifying member's own text.
AddendumG/TBT/N/USA/2026/Add.6
National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review
The U.S. Environmental Protection Agency (EPA or Agency) is taking final action to respond to comments on an interim final rule (IFR) related to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Integrated Iron and Steel Manufacturing Facilities (''II&S NESHAP''). Specifically, the EPA is responding to comments on the IFR published in the Federal Register on 3 July 2025 (notified as G/TBT/N/USA/2026/Add.4), that revised compliance deadlines for certain provisions related to planned bleeder valve openings, unplanned bleeder valve openings, blast furnace (BF) casthouses, basic oxygen process furnace (BOPF) shops, slag processing and handling, beaching, and fenceline monitoring. After carefully considering the comments, the EPA concludes that the amendments made in the IFR are warranted and is not making any further changes to the compliance deadlines revised in the IFR. This final rule is effective on 3 December 2025. 90 Federal Register (FR) 55681, 3 December 2025; Title 40 Code of Federal Regulations (CFR) Part 63: This final rule and previous actions notified under the symbol G/TBT/N/USA/2026 are identified by Docket Number EPA-HQ-OAR-2002-0083. The Docket Folder is available from Regulations.gov at and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number.
CorrigendumG/TBT/N/USA/2026/Add.5/Corr.1
National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review: Interim final rule; notification of public hearing and extension of public comment period; technical correction
The Environmental Protection Agency (EPA) is correcting a document that appeared in the Federal Register (FR) on 15 August 2025 (notified as G/TBT/N/USA/2026/Add.5). The EPA finalized the document announcing three public hearings and comment period extensions for the following rules: (1) Extension of Deadlines: Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review Interim Final Rule; (2) National Emission Standards for Hazardous Air Pollutants for Integrated Iron and Steel Manufacturing Facilities; (3) National Emission Standards for Hazardous Air Pollutants for Coke Ovens: Pushing, Quenching, and Battery Stacks, and Coke Oven Batteries. Following publication of this document, the EPA discovered inadvertent errors in the comment period extension dates for the Oil and Natural Gas and Iron and Steel rulemakings and is correcting them in this action. Effective 22 August 2025. 90 Federal Register (FR) 40975, 22 August 2025; Title 40 Code of Federal Regulations (CFR) Part 63: This action and previous actions notified under the symbol G/TBT/N/USA/2026 are identified by Docket Number EPA-HQ-OAR-2002-0083. The Docket Folder is available from Regulations.gov at and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number. WTO Members and their stakeholders are asked to…
AddendumG/TBT/N/USA/2026/Add.5
Comment deadline: Closed on 2 October 2025
National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review: Interim Final Rule; Notice of Public Hearing and Extension of Public Comment Period
On 3 July 2025, the Environmental Protection Agency (EPA) promulgated amendments to compliance dates in the National Emission Standards for Hazardous Air Pollutants for Integrated Iron and Steel Manufacturing Facilities (Integrated Iron and Steel Manufacturing) through an interim final rule (notified as G/TBT/N/USA/2026/Add.4). The EPA received requests to schedule a public hearing. Given the public interest and to further public participation, the EPA is granting these requests and will hold the public hearing via virtual platform. The public hearing for Integrated Iron and Steel Manufacturing will be held on 3 September 2025. In addition, the EPA is extending the deadline for written comments listed in the interim final rule to 2 October 2025. The EPA will consider submitted comments and address them as appropriate. Comments in response to the 3 July 2025, interim final rule for Integrated Iron and Steel Manufacturing must be received by 2 October 2025. The EPA will hold a virtual public hearing for the rulemaking Integrated Iron and Steel Manufacturing on 3 September 2025. The EPA will announce additional details on the virtual public hearing at 90 Federal Register (FR) 39333, 15 August 2025; Title 40 Code of Federal Regulations (CFR) Part 63: This action and previous actions notified under the symbol G/TBT/N/USA/2026 are identified by Docket Number EPA-HQ-OAR-2002-0083. The Docket Folder is available from Regulations.gov at and provides access to primary and supporting…
AddendumG/TBT/N/USA/2026/Add.4
Comment deadline: Closed on 1 August 2025
National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review: Interim Final Rule
The U.S. Environmental Protection Agency (EPA) is taking interim final action on the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Integrated Iron and Steel Manufacturing Facilities to revise certain compliance deadlines for standards finalized in 2024. Specifically, the EPA is revising certain compliance deadlines in the 2024 rule to 3 April 2027, in light of serious concerns that facilities will be unable to comply with the relevant requirements by the existing deadlines. This interim final rule is effective on 2 July 2025. Comments on this rule must be received on or before 1 August 2025. 90 Federal Register (FR) 29485, 3 July 2025; Title 40 Code of Federal Regulations (CFR) Part 63: This action and previous actions notified under the symbol G/TBT/N/USA/2026 are identified by Docket Number EPA-HQ-OAR-2002-0083. The Docket Folder is available from Regulations.gov at and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number. WTO Members and their stakeholders are asked to submit comments to the USA TBT Enquiry Point by or before 4pm Eastern Time on 1 August 2025. Comments received by the USA TBT Enquiry Point from WTO Members and their stakeholders will be submitted to the Docket and shared with EPA if received within the comment period.
AddendumG/TBT/N/USA/2026/Add.3
Partial Administrative Stay of National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review
By a letter dated 14 August 2024, and supplemented by a letter dated 5 March 2025, the Environmental Protection Agency (EPA) Office of Air and Radiation announced the convening of a proceeding for reconsideration of certain requirements in the final rule, 'National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review,'' published on 3 April 2024 (notified as G/TBT/N/USA/2026/Add.2). In this action, the EPA is staying provisions establishing compliance deadlines in 2025 for requirements that were added or revised by the 3 April 2024, final rule for 90 days pending reconsideration. Effective 31 March 2025. 90 Federal Register (FR) 14207, 31 March 2025; Title 40 Code of Federal Regulations (CFR) Part 63: This action and previous actions notified under the symbol G/TBT/N/USA/2026 are identified by Docket Number EPA-HQ-OAR-2002-0083. The Docket Folder is available from Regulations.gov at and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number.
AddendumG/TBT/N/USA/2026/Add.2
National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review
Final rule - The U.S. Environmental Protection Agency (EPA or the Agency) is finalizing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Integrated Iron and Steel Manufacturing Facilities to regulate hazardous air pollutant (HAP) emissions. The amendments include HAP from unmeasured fugitive and intermittent particulate (UFIP) sources previously not regulated by the NESHAP; previously unregulated HAP for sinter plants; previously unregulated pollutants for blast furnace (BF) stoves and basic oxygen process furnaces (BOPFs) primary control devices; and previously unregulated pollutants for BF primary control devices. We are also finalizing an update to the technology review for this source category. This and previous actions notified under the symbol G/TBT/N/USA/2026 are identified by Docket Number EPA-HQ-OAR-2002-0083. The Docket Folder is available from Regulations.gov at and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number. Title 40 Code of Federal Regulations (CFR) Part 63.
AddendumG/TBT/N/USA/2026/Add.1
Comment deadline: Closed on 29 September 2023
National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review
On 31 July 2023, the Environmental Protection Agency (EPA) issued a proposal titled, 'National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review.'' The EPA is extending the comment period on the proposed rule from 14 September 2023, to 29 September 2023. The public comment period for the proposed rule published in the Federal Register (FR) on 31 July 2023 (88 FR 49402) is being extended by 15 days. The comment period will now remain open until 29 September 2023, to allow additional time for stakeholders to review and comment on the proposal. This proposed rule; extension of comment period and the proposed rule notified as G/TBT/N/USA/2026 are identified by Docket Number EPA-HQ-OAR-2002-0083. The Docket Folder is available from Regulations.gov at and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number. WTO Members and their stakeholders are asked to submit comments to the USA TBT Enquiry Point by or before 4pm Eastern Time on 29 September 2023. Comments received by the USA TBT Enquiry Point from WTO Members and their stakeholders will be shared with the regulator and will also be submitted to the Docket on Regulations.gov if received within the comment period.
Regular notificationG/TBT/N/USA/2026
Comment deadline: Closed on 14 September 2023
National Emission Standards for Hazardous Air Pollutants: Integrated Iron and Steel Manufacturing Facilities Technology Review
Proposed rule - The U.S. Environmental Protection Agency (EPA) is proposing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Integrated Iron and Steel Manufacturing Facilities, as required by the Clean Air Act (CAA). To complete the required CAA section 112(d)(6) technology review promulgated on 13 July 2020, the EPA is proposing standards to regulate HAP emissions from five unmeasured fugitive and intermittent particulate (UFIP) sources, some of which are also referred to as 'fugitive' sources, that are currently not regulated by the NESHAP, as follows: Bell Leaks, Unplanned Bleeder Valve Openings, Planned Bleeder Valve Openings, Slag Pits, and Beaching. Also, for sinter plants we are proposing standards for the following five currently unregulated HAP: carbonyl sulfide (COS), carbon disulfide (CS2), mercury (Hg), hydrochloric acid (HCl), and hydrogen fluoride (HF); for blast furnace (BF) stoves and basic oxygen process furnaces (BOPFs), we are proposing standards for the following three unregulated pollutants: total hydrocarbons (THC), HCl, and dioxins/furans (D/F); and for BFs, we are proposing standards for the following two unregulated pollutants: THC and HCl. As an update to the technology review, we are proposing to revise the current BOPF shop fugitive 20 percent opacity limit to a 5 percent opacity limit and require specific work practices; revise the current BF casthouse fugitive 20 percent opacity limit to a 5 percent…
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