On July 28, 2026, OSHA reopened the rulemaking record on proposed revisions to the federal benzene standard and gave the public an additional 30 days to comment. The comment window closed on August 27, 2026 and the record is moving towards a final rule. Read the full Federal Register notice here.
Benzene is recognized as a Group 1 carcinogen by the International Agency for Research on Cancer (IARC), and long-term exposure to benzene is linked to myelodysplastic syndrome, acute myeloid leukemia, other leukemias and lymphomas, and aplastic anemia. Workers in petroleum refining, chemical manufacturing, rubber and plastics production, and fuel distribution face the highest exposure risks. Because these diseases can take years to surface, workers often can’t connect a later diagnosis to earlier workplace exposures.
What’s Changing and What Isn’t
OSHA’s current standard (29 CFR 1910.1028) sets a 1 ppm permissible exposure limit for benzene exposures averaged over 8 hours (PEL), a 5 ppm short-term exposure limit over any 15-minute period (STEL), and requires medical monitoring and surveillance of workers who could be exposed to 0.5 ppm for 30 or more days per year as well as workers who could be exposed at or above the 1 ppm PEL or 5 ppm STEL for 10 or more days per year.
OSHA also requires respiratory protection for workers when airborne concentrations exceed the 1 ppm PEL and work practice controls are not feasible or insufficient to reduce exposure levels. The pending proposal, first published in July 2025, doesn’t modify any exposure limits that apply to benzene-exposed workers. Instead, the proposal aims to simplify respiratory protection compliance and align the benzene standard with OSHA’s general Respiratory Protection Standard.
OSHA reopened the comment record specifically so the public could weigh in on recommendations from its Advisory Committee on Construction Safety and Health (ACCSH), which reviewed the proposal in April and May 2026.
This federal activity is unfolding alongside state-level developments in Pennsylvania, where Locks Law Firm maintains its headquarters and routinely litigates claims on behalf of benzene-exposed workers. Pennsylvania still grapples with legacy benzene contamination tied to industrial and refining sites, but new public air-quality monitoring tools are making neighborhood and facility-level exposure data more accessible to residents and workers. This new local data is worth following closely.
At Locks Law Firm, we are watching for what this federal rulemaking may signal more broadly. OSHA frames the changes as administrative simplification and claims that it will reduce paperwork and align the benzene standard with its general respiratory protection rule, without touching the numeric exposure limits. Employers and industry groups are likely to welcome that framing. But, as worker-safety advocates, we caution that “burden reduction” language has historically, in practice, loosened monitoring frequency, personal protective equipment (“PPE”) fit-testing, or documentation requirements that workplace protections depend on. The impact of this lessening of federal oversight is currently in the news related to the cyclospora outbreak. Whether this rulemaking follows that pattern won’t be clear until OSHA issues a final rule.
What to Watch
- ACCSH’s recommendations, now in the public docket, which may signal where the final rule is headed
- Whether the final rule preserves practical protections like consistent monitoring, fit-tested respirators, medical surveillance, even as paperwork requirements are streamlined
- Reactions and compliance efforts by business and industry groups in response to any new regulations or loosening of current policies.
- Any leukemia, lymphoma, or blood disorder diagnosis in workers with a history of benzene exposure, which can carry both workers’ compensation and third-party liability implications
As one of the leading plaintiff firms in the United States prosecuting benzene exposure claims on behalf of workers and communities, Locks Law Firm will continue tracking this and other benzene-related rulemaking and report on the final rule once it is issued.
