OEHHA performs major risk assessment and hazard evaluation activities relating to chemical contaminants in drinking water. These activities include developing health advisories, Public Health Goals for chemical substances in drinking water, Notification Levels, and providing toxicological assistance for chemical monitoring activities for the drinking water supply. The program also provides education to the public and other governmental agencies on drinking water contamination and drinking water regulatory standards development.

Reports, Notices, Documents

Dec 31, 2010: OEHHA Releases Revised Draft Public Health Goal for Hexavalent Chromium
Revised draft public health goal (PHG) for hexavalent chromium in drinking water. This document revises an earlier draft issued in August 2009 that proposed a PHG of 0.06 ppb. The PHG will serve as guidance for the California Department of Public Health (CDPH) in developing the nation’s first drinking water standard specifically for chromium 6.
Dec 28, 2010: Public Health Goal for Styrene
The PHG for styrene is established at 0.5 parts per billion (ppb), based on carcinogenic effects in mice, supported by genotoxic effects observed in humans and suggestive evidence of increased cancer in occupational studies.
Dec 10, 2010: Final Public Health Goal for Selenium
The PHG for selenium is established at 30 parts per billion (ppb) for water-soluble and bioavailable selenium compounds in drinking water. The health-protective level is based on avoidance of several symptoms of chronic selenosis in humans, including increased frequency of thickened and brittle fingernails, garlic odor in the breath, hair loss, skin lesions, and disturbances of the digestive tract.