Prop 65 Roundup - June 2026

Prop 65 Counsel: What To Know

OEHHA Convenes DARTIC Meeting

The Office of Environmental Health Hazard Assessment (OEHHA) announced that it will convene a public meeting of the Developmental and Reproductive Toxicant Identification Committee (DARTIC) on June 18. The meeting will include discussion and updates on the development of hazard identification materials for p,pʹ‑bisphenol chemicals, which are under review for potential listing as reproductive toxicants under Proposition 65. OEHHA is seeking input from Committee members and the public as it continues to evaluate the scientific evidence supporting potential listing of this class of chemicals, which may be considered by the DARTIC in a future meeting.

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OEHHA Notices

OEHHA Proposes Listing of Pharmaceuticals Under Labor Code Mechanism

OEHHA issued a notice of intent to list three pharmaceutical substances — hydrochlorothiazide, voriconazole, and tacrolimus — under the Proposition 65 list pursuant to the Labor Code mechanism. The proposed listings are based on determinations by authoritative bodies that these substances are known to cause cancer or reproductive toxicity. If finalized, the listings would trigger Proposition 65 warning requirements following the applicable one‑year grace period.

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OEHHA Issues Notice of Intent to List Welding Fumes

OEHHA announced its intent to list welding fumes as a chemical known to cause cancer under Proposition 65 through the Labor Code listing mechanism. The proposed listing is based on findings by authoritative bodies evaluating occupational exposure risks associated with welding operations. Welding fumes consist of complex mixtures of metallic oxides, silicates, and fluorides generated during welding processes, and their inclusion on the Proposition 65 list would have broad implications across industrial and manufacturing sectors. If adopted, the listing could result in new warning obligations for employers and businesses whose operations expose individuals to welding fumes in occupational or commercial settings.

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