Events

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.

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.

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 is extending the public comment period by 15 days on the draft technical support document for the proposed Public Health Goal (PHG) for 1,4-dioxane in drinking water. The comment period will now close on November 25, 2025.

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.

The Office of Environmental Health Hazard Assessment (OEHHA) is announcing the availability of a draft document for public review summarizing the noncancer reference exposure levels (RELs) for 1,4-Dichlorobenzene, as part of the Air Toxics Hot Spots program. OEHHA is also anouncing a comment period that will open November 29, 2024 and will close January 13, 2025. 

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.

Human health impacts (heat, wildfire smoke and air quality) webinar: Bridging Science and Action.  The sixth in the series, co-convened with the California Department of Public Health and the California Air Resources Board, addresses the impacts of heat, wildfire smoke and changes in air quality on Californians’ health, and efforts underway to address them.