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Welding Fumes Added to the Proposition 65 List for Cancer
The California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) intends to list welding fumes as known to the state to cause cancer under the Safe Drinking Water and Toxic Enforcement Act of 1986, sections 25249.5 et seq. of the Health and Safety Code (HSC), otherwise known as Proposition 65.
Hydrochlorothiazide, Voriconazole, and Tacrolimus Added to the Proposition 65 List for Cancer
Effective July 17, 2026, the Office of Environmental Health Hazard Assessment (OEHHA) is adding hydrochlorothiazide, voriconazole, and tacrolimus to the list of chemicals known to the State of California to cause cancer under the Safe Drinking Water and Toxic Enforcement Act of 1986, sections 25249.5 et seq. of the Health and Safety Code, otherwise known as Proposition 65.
California releases CalEnviroScreen 5.0 to identify and prioritize pollution-burdened communities, announces preliminary disadvantaged communities designation
Press release announcing CalEnviroScreen 5.0 release
California publica CalEnviroScreen 5.0 para identificar y priorizar a las comunidades afectadas por la contaminación, y anuncia la designación preliminar de comunidades desfavorecidas
(Spanish) Press release announcing CalEnviroScreen 5.0 release
Proposition 65: Omnibus 2026 Pre-Rulemaking
The Office of Environmental Health Hazard Assessment (OEHHA) will host an in-person and online workshop to discuss potential amendments to the Proposition 65 regulations on July 30, 2026. The workshop will include a discussion of potential regulatory amendments that OEHHA will publish on its website prior to the workshop.
Proposed Rulemaking: Title 27 California Code of Regulations, Section 25705 No Significant Risk Level for 1-Bromopropane and Diethanolamine (Dermal)
At the request of the Personal Care Products Council, OEHHA hereby extends the public comment period. The Office of Environmental Health Hazard Assessment is proposing a Proposition 65 No Significant Risk Level for diethanolamine
by the dermal route and 1-bromopropane in Title 27, California Code of Regulations, section 25705(b)(1).
Inhalation Unit Risk Factor (IUR) for Acrolein
OEHHA is releasing a draft document for public review that summarizes the carcinogenicity data and derives a cancer inhalation unit risk factor (IUR) for acrolein.
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Inhalation Unit Risk Factor (IUR) for Ethylene Oxide
OEHHA is releasing a draft document for public review that summarizes the carcinogenicity data and derives an updated cancer inhalation unit risk factor (IUR) for ethylene oxide.
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June 2026 Developmental and Reproductive Toxicant Identification Committee Meeting
The Office of Environmental Health Hazard Assessment will convene a meeting of the Developmental and Reproductive Toxicant Identification Committee on June 18, 2026. The meeting will include a discussion and updates on the development of hazard identification materials on p,pʹ-bisphenol chemicals.
State Launches a New Feature to CalHeatScore to Make Extreme Heat Info Accessible to More Californians
CalHeatScore API allows integration of CalHeatScore data into variety of applications
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