OEHHA's 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.

Sacramento Office
1001 I Street,
Sacramento, CA 95814
(916) 324-7572
Map and directions

our mailing address:
Post Office Box 4010
Sacramento, CA 95812-4010.

Oakland Office
1515 Clay Street, 16th floor
Oakland, California 94612
(510) 622-3200
Map and directions

Executive Office

Lauren Zeise, Director
(916) 322-6325

Allan Hirsch, Chief Deputy Director
(916) 322-6325

David Siegel
Assistant Deputy Director for Scientific Affairs

Mike Gyurics, Acting Deputy Director, Administrative Services

Carol J Monahan Cummings, Chief Counsel
(916) 322-6325

Sam Delson, Deputy Director, External and Legislative Affairs
(916) 322-6325

File an Environmental Complaint

If you have observed an activity, physical evidence of an activity or have knowledge of what you think may be a possible illegal act that caused harm or damage to California's public health or environment, the California Environmental Protection Agency (CalEPA) would like to know. Use this Environmental Complaint Form to file an environmental complaint with CalEPA.

Department Description

The Office of Environmental Health Hazard Assessment (OEHHA) is the lead state agency for the assessment of health risks posed by environmental contaminants. OEHHA’s mission is to protect human health and the environment through scientific evaluation of risks posed by hazardous substances. The Office is one of five state departments within the California Environmental Protection Agency (CalEPA).

OEHHA implements the Safe Drinking Water and Toxic Enforcement Act of 1986, commonly known as Proposition 65, and compiles the state’s list of substances that cause cancer or reproductive harm. The Office also develops health-protective exposure levels for contaminants in air, water, and soil as guidance for regulatory agencies and the public. These include public health goals for contaminants in drinking water and both cancer potency factors and non-cancer reference exposure levels for the Air Toxics Hot Spots Program.

Other key OEHHA activities include:

The Office also provides scientific peer review of pesticide risk assessments; works with the Department of Pesticide Regulation to develop regulations to protect pesticide worker health and safety; trains physicians to recognize pesticide-related illnesses; and works with the California Department of Food and Agriculture to provide health information on pesticide applications aimed at combating invasive species.

Program Descriptions

The mission of the individual sections within OEHHA