OEHHA

Our mission is to protect and enhance the health of Californians and our state's environment through scientific evaluations that inform, support and guide regulatory and other actions.
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California announces tool to protect at-risk communities from dangerous heat waves ahead of triple-digit temperatures

CalHeatScore provides localized warnings and resources for extreme heat events
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California Anuncia una Herramienta Vital Para Proteger a las Comunidades en Riesgo de las Peligrosas Olas de Calor Antes de las Anticipadas Temperaturas de Tres Dígitos

CalHeatScore proporciona advertencias y recursos localizados para eventos de calor extremo.
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Fish Advisory Update for Lake Combie Offers Safe-Eating Advice for Three Species

Updated fish consumption advice issued for Lake Combie in Nevada and Placer counties.
| Fish

Hexavalent Chromium in Drinking Water

The Office of Environmental Health Hazard Assessment (OEHHA) is announcing the availability of a second 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).
| Water

Bisphenol S (BPS) Added to the Proposition 65 List for Male Reproductive Toxicity

The Office of Environmental Health Hazard Assessment (OEHHA) added the male reproductive toxicity endpoint to the existing Proposition 65 listing of bisphenol S (BPS) for reproductive toxicity via the State's Qualified Experts mechanism, effective January 3, 2025. Meeting transcript and materials are available.
| Proposition 65

Release of the draft report on Synthetic Turf and Scientific Advisory Panel Meeting

The Office of Environmental Health Hazard Assessment (OEHHA) is announcing the release of a draft report on the potential health risks associated with the use by athletes, referees, coaches and spectators of synthetic turf fields.
| Risk Assessment

Vinyl Acetate Added to the Proposition 65 List for Cancer

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.
| Proposition 65

Oil Spills & Seafood Safety

Evaluation of seafood safety consumption following oil spills

| Fish

Health Risk Information for Public Health Goal Exceedance Reports

This document contains health risk information on regulated drinking water contaminants to assist public water systems in preparing these reports. NEW for the 2022 Report: New in this document are an updated Public Health Goal (PHG) for 1,2-dibromo-3-chloropropane (DBCP) and newly established PHGs for the trihalomethanes bromodichloromethane, bromoform, chloroform, and dibromochloromethane.

| Water

Reference Exposure Levels (RELs) for 1,4-Dichlorobenzene

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. 

| Air