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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News

Landmark Study Finds No Significant Risk from Key Component of Synthetic Turf Fields

The California Office of Environmental Health Hazard Assessment released a study finding that recycled tires used as crumb rubber in synthetic turf are not likely to harm users or spectators.
| Risk Assessment

Release of the Final Report on Synthetic Turf

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

Fish Advisory for Los Vaqueros Reservoir Offers Safe-Eating Advice for Six Species

Fish consumption advisory for Los Vaqueros Reservoir in Contra Costa County.
| Fish

Health-Protective Concentration for Noncancer Effects of Hexavalent Chromium

OEHHA has finalized a health-protective concentration for noncancer effects of hexavalent chromium (Cr(VI)) in drinking water, as part of the process of updating the Cr(VI) Public Health Goal.
| Water

OEHHA comments on US EPA’s Updated Draft Risk Calculation Memorandum on Formaldehyde

OEHHA has submitted comments on US EPA’s Updated Draft Risk Calculation Memorandum for a revised Risk Evaluation for Formaldehyde under the Toxic Substances Control Act (TSCA).
| Risk Assessment

Draft CalEnviroScreen 5.0

CalEnviroScreen 5.0
| CalEnviroScreen

Oil Spills & Seafood Safety

Evaluation of seafood safety consumption following oil spills

| Fish

Health-based Recommendations to Address Potential Cancer Risks to Occupational Bystanders from the use of 1,3-D

Restrictions on 1,3-Dichloropropene (1,3-D) to protect occupational bystanders. New regulations, developed jointly and mutually by the California Department of Pesticide Regulation and the Office of Environmental Health Hazard Assessment, are effective January 1, 2026 to reduce the risk of 1,3-D exposure to occupational bystanders.
| Pesticides

Request for Relevant Information on the Carcinogenicity of Ethoprop

OEHHA is referring ethoprop to the Carcinogen Identification Committee, the state’s qualified experts for carcinogenicity determinations under Proposition 65, for review for possible delisting.
| Proposition 65

Fish Advisory for Bass Lake Offers Safe-Eating Advice for Five Species

Fish consumption advisory for Bass Lake in Madera County.
| Fish