Office of Environmental Health Hazard Assessment (OEHHA)

OEHHA develops health-protective exposure levels for contaminants in air, water, and soil as guidance for regulatory agencies and the public, including public health goals for contaminants in drinking water. 

Specifically, the OEHHA:

  • Performs major risk assessment and hazard evaluation activities relating to chemical contaminants in drinking water, including health advisories, Public Health Goals for chemical substances in drinking water, and Notification Levels. 
  • Provides toxicological assistance for chemical monitoring activities for the drinking water supply.
  • Has developed a Human Right to Water Framework and Data Tool.
  • Provides education to the public and other governmental agencies on drinking water contamination and drinking water regulatory standards development.
  • Develops fish advisories for mercury and other contaminants in sport fish from water bodies throughout the state.

Click here to learn more about the OEHHA's water programs.