Latest News

OEHHA recommends action levels of 260 ppb (ug/L) for sec-butylbenzene and tert-butylbenzene.

OEHHA released the final document, "Air Toxics Hot Spots Program Risk Assessment Guidelines Part IV: Exposure Assessment and Stochastic Analysis Technical Support Document."

Availability of the Background Document for the Public Workshop on Developing Safe Harbor Numbers

Chemicals under consideration for possible listing via the Administrative Bodies mechanisms: Request for relevant information.

Public workshop - OEHHA is soliciting input on the process and order by which the safe harbor numbers should be developed.

Availability of the revised criteria for identifying chemicals for listing as "Known to the State to Cause Cancer"

OEHHA announced the date for an Air Quality Advisory Committee public meeting and two workshops. The agenda included discussions on the health-protectiveness of the ambient air quality standards.

OEHHA announced a public meeting of the Air Quality Advisory Committee (AQAC), as well as public workshops on the health protectiveness of the ambient air quality standards for carbon monoxide, nitrogen dioxide, ozone, sulfur dioxide, particulate matter, sulfates, lead, and hydrogen sulfide.

OEHHA announces the availability of six Public Health Goals for chemicals in drinking water.  These chemicals are: carbofuran, carbon tetrachloride, dichloromethane, diquat, thiobencarb, and vinyl chloride

Notice to interested parties: Availability of the draft hazard identification documents for hexachlorobutadiene, 4-methylquinoline, and MX(3-chloro-4-(dichloromethyl)-5-hydroxy-2(5h)-furanone).