EPA proposes pushing TCE phase-out deadlines to the end of 2027

The Environmental Protection Agency has proposed giving some companies more than a year of extra time to stop using trichloroethylene, a solvent the agency has already determined poses an unreasonable risk to human health. The proposal, published in the Federal Register on 14 October 2026, would move several compliance deadlines set under the agency's 2024 risk-management rule for the chemical [s1].

Trichloroethylene, or TCE, is regulated under the Toxic Substances Control Act. Under that law, once the EPA finds through a risk evaluation that a chemical "presents an unreasonable risk of injury to health or the environment," it must issue a rule restricting the chemical so it no longer presents that risk [s1]. The agency made such a finding for TCE and, in a final rule issued in 2024, began phasing out its manufacture, processing and use, with staggered deadlines for different conditions of use [s1][s2].

What the proposal would change

The new action does not reopen the underlying finding of risk. It proposes only to extend specific compliance dates [s1]. The EPA would amend its regulations to push the prohibition deadline for several narrow industrial uses — TCE processed as a reactant or intermediate, and its use as a "processing aid" in applications such as battery manufacture, polymer fibre spinning, fluoroelastomer and Alcantara manufacture, caprolactam extraction and beta-cyclodextrin production — from 18 December 2026 to 31 December 2027 [s1]. The same extension would apply to the disposal of wastewater containing trace levels of TCE from those processes [s1].

A separate provision concerns refrigerant production. The agency proposes to move a deadline in the phase-out of TCE used as an intermediate to make HFC-134a from 7 June 2027 to 31 December 2027, for manufacturers processing TCE at no more than 75 percent of a baseline volume [s1]. Downstream notification requirements and the hazard text that must appear on safety data sheets would be updated to match the revised dates [s1].

The agency's rationale

The EPA frames the extensions as transition relief rather than a change of policy, saying they would "allow for necessary and reasonable transition periods for regulated entities" under the provision of the toxics law that lets the agency set compliance timelines [s1]. It notes that agencies may revise prior rules provided they acknowledge the change, give a reasoned explanation and account for any "serious reliance interests," and states that it "is not aware of any serious reliance interests regarding this proposal" [s1].

The chemical at the centre of the action has a long regulatory history. TCE has been used as a degreaser and industrial solvent and is addressed under the same TSCA risk-management framework the EPA has applied to other legacy solvents. The 2024 rule the agency is now proposing to amend was the action that translated its unreasonable-risk determination into enforceable prohibitions and deadlines [s2]. A separate interim final rule in 2025 had already extended compliance dates for two specific TCE uses; the current proposal would adjust dates finalised in 2024 and in that later amendment [s1].

What happens next

The proposal is not final. The EPA is taking public comment through 13 November 2026, under docket number EPA-HQ-OPPT-2026-7327, and says a plain-language summary of the rule is available on the federal rulemaking portal [s1]. Only after reviewing comments would the agency decide whether to finalise the new dates, keep the existing ones, or set different deadlines.

For now, the fixed points are the dates the agency has put on the table: a shift of the processing and processing-aid prohibition, and the associated wastewater-disposal restriction, from December 2026 to the end of December 2027, and a shift of one step in the HFC-134a phase-out from June 2027 to the same end-of-2027 date [s1]. The prohibitions themselves, and the finding of unreasonable risk that produced them, are not on the table in this action. What is being decided is how long companies have to comply, not whether they must.

The distinction matters for the health rationale. An extension of a compliance date does not change the EPA's conclusion about the chemical's hazard; it lengthens the period during which the regulated uses may continue before the prohibition bites. Whether the final deadlines land where the agency has proposed will depend on the comment record and the agency's response to it [s1].