The Office of Environmental Health Hazard Assessment (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.

To learn more about OEHHA click here.

Wild Fire Smoke - A Guide for Public Health Officials is designed to help local public health officials prepare for smoke events, take measures to protect the public when smoke is present, and communicate with the public about wildfire smoke and health.

Protecting Public Health from Home and Building Fire Ash This report summarizes safe methods of ash cleanup. Protección de la Salud Pública contra las Cenizas de Incendios en Casas y Edificios (Spanish)


For more information on: How Smoke from Fires Can Affect Your Health


Oct 22, 2018: Notice of Modification to Text Proposed Amendments to Article 6 Clear and Reasonable Warnings Residential Rental Property Exposure Warnings New Sections 25607.34 and 25607.35
OEHHA is requesting comments on the modifications to the regulatory text.  In order to be considered, OEHHA must receive comments by 5:00 p.m. on November 7, 2018, the designated close of the comment period.  All comments will be posted on the OEHHA website at the close of the public comment period.
Oct 5, 2018: Notice of Intent to list Bevacizumab
The California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) intends to list bevacizumab as known to the state to cause reproductive toxicity (developme