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

Feb 27, 2015: OEHHA Adopts Updated Public Health Goal for Perchlorate
OEHHA has adopted an updated public health goal (PHG) of 1 part per billion (ppb) for perchlorate in drinking water.  This PHG updates the 2004 perchlorate value of 6 ppb.  Perchlorate is known to block the thyroid’s ability to take in and process iodide, which is a nutrient essential to brain development, growth, heart function, and other systems.
Feb 27, 2015: Water Chemicals
Entry point for information on chemcials in water.
Feb 1, 2015: Public Health Goals (PHGs)
General information on public health goals with a table of all PHG values.  The table includes the chemical name, the PHG value (mg/L) and the date the PHG was last updated.