Proposed update of the PHGs for nitrate and nitrite published in 1997. OEHHA is proposing to retain the original PHG values.
Water
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
Comment period on the proposed update of the PHGs for nitrate and nitrite published in 1997. OEHHA is proposing to retain the original PHG values.
The workshop is provided to enable a dialogue between OEHHA scientists and the public to discuss the scientific basis of the proposed PHG updates, and to receive comments.
Extension of Public Comment period on the PHG review for Nickel
Extension of Public Comment period on the PHG review for: Hexavalent Chromium
Initiation of PHG reviews for four chemicals: Cis-1,2-Dichloroethylene, Trans-1,2-Dichloroethylene, Hexavalent Chromium and Nickel
Comment period on the Initiation of PHG reviews for four chemicals: Cis-1,2-Dichloroethylene, Trans-1,2-Dichloroethylene, Hexavalent Chromium and Nickel
Includes changes in critical study and endpoint selection, and updated dose-response analysis and exposure estimates. These changes resulted in the revision of the antimony PHG to 1 ppb.
The updated PHGs are 0.7 parts per billion (ppb) for carbofuran, 6 ppb for diquat, 0.3 ppb for endrin, 166 ppb for picloram, and 42 ppb for thiobencarb, all based on non-cancer effects.
2nd public comment period proposed updated PHGs for Carbofuran (0.7 ppb), Diquat (6 ppb), Endrin (0.3 ppb), Picloram (166 ppb), and Thiobencarb (42 ppb) in drinking water.