EPA Opens Public Comment Period on Final TSCA Risk Management Rule for Carbon Tetrachloride
Released October 9, 2025
The U.S. Environmental Protection Agency (EPA) is opening a 30-day public comment period on its 2024 final risk management rule for carbon tetrachloride (CTC) under the Toxic Substances Control Act (TSCA). This is the first step in EPA’s efforts to reconsider and, if appropriate, revise the final risk management rule. This review is being done in accordance with applicable law, Executive Orders, and Administration policies, including Executive Order 14219 “Ensuring Lawful Governance and Implementing the President’s ‘Department of Government Efficiency’ Deregulatory Initiative and the EPA’s Powering the Great American Comeback Initiative Pillar I: Clean Air, Land, and Water for Every American.
After the final rule was published, several legal challenges were filed. These petitions for review were consolidated in the U.S. Court of Appeals for the Eighth Circuit. The agency has since determined that the CTC final rule should be reconsidered through further rulemaking. Feedback received during this comment period will help inform next steps in this reconsideration.
EPA invites public comment on all aspects of the CTC final rule, including but not limited to any existing or anticipated implementation issues associated with the final rule requirements, experiences with the CTC final rule since it went into effect, and whether the agency should consider additional or alternative measures or approaches to address the unreasonable risk presented by CTC under the conditions of use. Specifically, the agency is interested in additional information on the Existing Chemical Exposure Limit (ECEL) of 0.03 parts per million (ppm) as an 8-hour time weighted average (TWA) promulgated in the CTC final rule as part of the Workplace Chemical Protection Program (WCPP) (see 40 CFR 751.703 and 751.707(b)), including feasibility of exposure monitoring and whether the use of a different exposure limit would be more appropriate to inform risk management.
Read the Federal Register Notice opening the docket for CTC for more information regarding EPA’s call for comments.
EPA will accept comments for 30 days beginning today, until November 10, 2025, on docket EPA-HQ-OPPT-2020-0592. Going forward, the public will also have an opportunity to comment on any notice of proposed rulemaking to amend the final CTC rule.