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Summary table of all OEHHA acute, 8-hr and chronic Reference Exposure Levels (chRELs) as of August 2020. Documentation for these values is available in the Air Toxics Hot Spots Program Guidance Manual for the Preparation of Health Risk Assessments 2015.
Oct 11, 2023, Program: Air
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.
Oct 6, 2023, Program: Air
A state fish advisory issued today for El Capitan Reservoir in San Diego County provides safe-eating advice for black bass species, Blue Catfish, Mississippi Silverside, Sculpin, sunfish species and Threadfin Shad.
Sep 13, 2023, Program: Fish
2020 Recommendations to the California Public Utilities Commission Regarding Health Protective Standards for the Injection of Biomethane into the Common Carrier Pipeline.
Sep 9, 2023, Program: Air
OEHHA has developed a priority list for the development of NSRLs
Sep 1, 2023, Program: Proposition 65
The California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) intends to list anthracene (CAS RN 120-12-7), 2‑bromopropane (CAS RN 75-26-3 [corrected as of June 27, 2023]), and dimethyl hydrogen phosphite (CAS RN 868-85-9) as known to the state to cause cancer.
Aug 11, 2023, Program: Proposition 65
OEHHA provided a report to the legislature detailing its activities related to the Children's Environmental Health Program.
Aug 10, 2023, Program: Risk Assessment
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.
Aug 4, 2023, Program: Air
The California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) has selected vinyl acetate for the Carcinogen Identification Committee (CIC)’s review for possible listing under the Safe Drinking Water and Toxic Enforcement Act of 1986.
Aug 4, 2023, Program: Proposition 65
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.
Aug 2, 2023, Program: CalEnviroScreen