Events

Carcinogen Identification Committee Meeting - Tuesday, November 17, 2026
OEHHA is referring ethoprop to the Carcinogen Identification Committee for a recommendation concerning whether the chemical should continue to be included on the list of chemicals known to the state to cause cancer.
Meeting date: Tue, 11/17/2026 - 10:00am - Tue, 11/17/2026 - 05:00pm , Program: Proposition 65
2026 Fall Expert Panel on Emerging Risk Assessment Approaches Public Meeting
The Office of Environmental Health Hazard Assessment (OEHHA) will host a virtual public meeting of the Expert Panel on Emerging Risk Assessment Approaches (EPERA) on November 20, 2026, from 9:00 to 10:00 a.m. Pacific Time
Meeting date: Fri, 11/20/2026 - 09:00am - Fri, 11/20/2026 - 10:00am , Program: New Toxicology Evaluations

Past Events

Proposition 65: Vinyl Acetate Pre-Regulatory Workshop
The Office of Environmental Health Hazard Assessment (OEHHA) will host an online pre-regulatory workshop to discuss a potential set of amendments related to vinyl acetate to existing Proposition 65 regulations on September 30, 2026.
Meeting date: Wed, 09/30/2026 - 10:00am - Wed, 09/30/2026 - 11:30am, Program: Proposition 65
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.
Meeting date: Thu, 07/30/2026 - 10:00am - Thu, 07/30/2026 - 11:30am, Program: Proposition 65
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.
Meeting date: Thu, 06/18/2026 - 10:00am - Thu, 06/18/2026 - 05:00pm, Program: Proposition 65
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.
Meeting date: Wed, 06/10/2026 - 04:00pm - Wed, 06/10/2026 - 07:00pm, Program: Air
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.
Meeting date: Wed, 06/10/2026 - 04:00pm - Wed, 06/10/2026 - 07:00pm, Program: Air
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.
Meeting date: Thu, 06/04/2026 - 10:00am - Thu, 06/04/2026 - 01:00pm, Program: Air
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.
Meeting date: Thu, 06/04/2026 - 10:00am - Thu, 06/04/2026 - 01:00pm, Program: Air
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.
Meeting date: Tue, 06/02/2026 - 04:00pm - Tue, 06/02/2026 - 07:00pm, Program: Air
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.
Meeting date: Tue, 06/02/2026 - 04:00pm - Tue, 06/02/2026 - 07:00pm, Program: Air
N-Methyl-N-Formylhydrazine Added to the Proposition 65 List for Cancer
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.
Meeting date: Tue, 11/18/2025 - 10:00am - Tue, 11/18/2025 - 05:00pm, Program: Proposition 65