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The Office of Environmental Health Hazard Assessment (OEHHA) is adopting a new cancer inhalation Unit Risk Factor (IUR) for Isoprene.

The Office of Environmental Health Hazard Assessment (OEHHA) is announcing the availability of a draft document describing a proposed health-protective concentration (HPC) for noncancer effects of hexavalent chromium (Cr(VI)) in drinking water, as part of the update to the Cr(VI) Public Health Goal (PHG). OEHHA will hold a hybrid workshop on January 8, 2024, the public workshop agenda is now available. 

The US EPA and OEHHA are hosting two joint virtual trainings on CalEnviroScreen and EJScreen for community members and non-profit organizations interested in using environmental justice (EJ) data tools in grant applications.

The Office of Environmental Health Hazard Assessment is adopting revised cancer inhalation unit risk (IUR) and slope factors for cobalt and water-soluble cobalt compounds for use in the Air Toxics Hot Spots program for use in the Air Toxics Hot Spots Program.

Please join OEHHA and the Children’s Environmental Health Center for a virtual symposium series exploring the effects of heat on children and during pregnancy. This highly interactive four-session symposium will cover physiologic considerations for children and pregnancy, strategies to combat health effects in children and during pregnancy, and important considerations for these populations in the development of heat health warning systems.

The Office of Environmental Health Hazard Assessment is announcing the webcast option for the Northern California Public Workshop on releasing a draft document for public review that summarizes the carcinogenicity data and derives an updated cancer inhalation unit risk factor for ethylene oxide. At the request of the American Chemistry Council, OEHHA hereby extends the public comment period. The public comment period will now close on Wednesday, June 14, 2023. 

The Office of Environmental Health Hazard Assessment is adopting new Reference Exposure Levels for Trimethylbenzenes for use in the Air Toxics Hot Spots Program. Reference Exposure Levels are airborne concentrations of a chemical that are not anticipated to result in adverse noncancer health effects for specified exposure durations in the general population, including sensitive subpopulations.

The Office of Environmental Health Hazard Assessment (OEHHA) is releasing a draft document for public review, summarizing the toxicity and derivation of proposed Reference Exposure Levels (RELs) for 1-Bromopropane (1-BP). The posting of the document will commence a 45-day public review period that will end on February 22, 2022.  A remote public workshop will be held virtually on January 26, 2022 at 10:00 AM using the Zoom platform. 

We will gather remotely to hear and collect perspectives and information on the climate change impacts being experienced by tribal communities in Lake, Sonoma, and Mendocino Counties.