EPA Extends Delay on TCE Exemption Conditions Until Judicial Review Ends

The Environmental Protection Agency on May 5, 2026, issued a notification extending the postponement of effectiveness for conditions on TSCA section 6(g) exemptions in its trichloroethylene regulation, signed by President Donald Trump and published in the Federal Register.

The rule affects industries and entities that rely on trichloroethylene (TCE), a solvent used in applications such as metal degreasing, dry cleaning, and aerospace manufacturing. Per standard knowledge of TSCA regulations, section 6(g) exemptions typically cover essential uses where alternatives are not immediately available, impacting sectors like defense and critical infrastructure that handle an estimated 10,000 to 100,000 tons of TCE annually in the U.S., based on prior EPA data on chemical production volumes.

The original final rule, published December 17, 2024, at 89 FR 102568, imposed specific conditions on these exemptions to mitigate health and environmental risks from TCE exposure. Previously, a postponement delayed these conditions, and this extension maintains that status quo.

The new postponement takes effect May 18, 2026, and lasts until the conclusion of judicial review, per the Federal Register notice.

Affected users now operate without the added regulatory conditions during the court process, which could extend operations in exempted categories for months or years depending on litigation timelines. The judicial review, likely involving challenges from industry groups or environmental advocates, will determine the final status of the exemptions, potentially triggering EPA revisions or enforcement actions post-ruling.

No new comment periods open with this extension, but congressional oversight under the Congressional Review Act remains possible if lawmakers target the underlying rule.

The original TCE regulation finalized under the prior administration in late 2024 followed years of risk evaluations identifying TCE as a carcinogen and neurotoxin. This 2026 extension marks the latest delay in implementing full restrictions, aligning with broader policy shifts in environmental enforcement.