Notices

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.

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.

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.

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).

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.

OEHHA may send letters to interested parties that assist in understanding Proposition 65 statutes and regulations, and their application.

OEHHA is referring ethoprop to the Carcinogen Identification Committee, the state’s qualified experts for carcinogenicity determinations under Proposition 65, for review for possible delisting.

Effective December 8, 2025, the Office of Environmental Health Hazard Assessment has added the developmental toxicity endpoint to the reproductive toxicity listing of bisphenol S (BPS) under Proposition 65. This addition was done via the “State’s Qualified Experts” listing mechanism, based on the Developmental and Reproductive Toxicant Identification Committee’s determination that this chemical was clearly shown to cause developmental toxicity.

Effective December 8, 2025, the Office of Environmental Health Hazard Assessment added N-methyl-N-formylhydrazine to the Proposition 65 list as a carcinogen. This listing was done via the “State’s Qualified Experts” mechanism, based on the Carcinogen Identification Committee’s determination that this chemical was clearly shown to cause cancer.

OEHHA has selected p,pʹ-bisphenol chemicals for the DARTIC’s review for possible listing under Proposition 65 as causing reproductive toxicity. p,pʹ-Bisphenol chemicals include p,pʹ-bisphenols, and ethers and esters of p,pʹ-bisphenols.

The Office of Environmental Health Hazard Assessment has adopted No Significant Risk Levels for titanium dioxide (airborne, unbound particles of respirable size)of 440 micrograms per day for airborne, unbound titanium dioxide particles with diameters of 10 micrometers or less, and 44 micrograms per day for airborne, unbound titanium dioxide particles with diameters of 0.8 micrometers or less.

OEHHA will convene a meeting of the Developmental and Reproductive Toxicant Identification Committee (DARTIC). At this meeting the DARTIC will consider the possible listing of bisphenol S (BPS) based on developmental toxicity. OEHHA is also opening a 45-day public comment period on the hazard identification document entitled “Evidence on the Developmental Toxicity of Bisphenol S."

OEHHA’s Proposition 65 Implementation Team will host another presentation that will help businesses understand and comply with Proposition 65.

OEHHA’s Proposition 65 Implementation Team will host a hybrid training that will help businesses understand and comply with Proposition 65.

OEHHA has developed a priority list for the development of NSRLs

Information on the background of Proposition 65 and links to specific regulatory content.

Effective January 3, 2025, the Office of Environmental Health Hazard Assessment (OEHHA) has added vinyl acetate to the Proposition 65 list as a carcinogen. This listing was done via the “State’s Qualified Experts” mechanism, based on the Carcinogen Identification Committee’s (CIC) determination that this chemical was clearly shown to cause cancer.

The Office of Environmental Health Hazard Assessment (OEHHA) has amended Title 27, this regulatory action will make the Proposition 65 short-form warning more informative to consumers.

The California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment has selected N-methyl-N-formylhydrazine for the Carcinogen Identification Committee review for possible listing under the Safe Drinking Water and Toxic Enforcement Act. This notice announces a data call-in to solicit information from the public relevant to the assessment of its carcinogenicity. N-Methyl-N-formylhydrazine was selected from chemicals prioritized by the CIC.

El Departamento de Reglamentación de Pesticidas (DPR por sus siglas en inglés) de California ha propuesto nuevas reglamentaciones elaboradas de manera conjunta y mutua con la Oficina de Evaluación de Riesgos para la Salud Ambiental (OEHHA, por sus siglas en inglés) para proteger espectadores ocupacionales en los alrededores de campos tratados para reducir su riesgo de exposición al 1,3-D.