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Background information on OEHHA's use of epidemeiological studies, with links to health studies of criteria air pollutants, traffic exposure, and human health impacts of climate change.

Revised potency values for PCE are based on the elevated incidence of several tumor types observed in male mice and rats.  Unit Risk Factor 6.1 E-06 (µg/m3)-1  Slope Factor 2.1E-02 (mg/kg-day)-1.

OEHHA is responsible for conducting health risk assessments of chemical contaminants in air. In addition, OEHHA reviews site-specific risk assessments under the Air Toxics Hot Spots program and is developing risk assessment guidance, some of which has been completed, for use in site-specific risk assessment (see Air Toxics Hot Spots).

The Hot Spots program collects emission data, to identify facilities having localized impacts, to ascertain health risks, to notify nearby residents of significant risks, and to reduce those significant risks to acceptable levels.

Public comment period on the document "Draft Inhalation Cancer Unit Risk Factor for Perchloroethylene" begins on February 16, 2016 and ends on April 1, 2016.

2016 OEHHA, Western States PEHSU at UCSF, and UC Berkeley CIRCLE children’s environmental health symposium exploring "New Findings from California”.

The health advisory regarding Dungeness crabs caught along the coast has been lifted from state waters in all areas south of Latitude 38° 00' N, near Point Reyes.

Interactive map of California with links to fish advisories.

Comment period on the possible reproductive toxicity of: n-Hexane, Nickel and Nickel Compounds, Perfluorooctanoic acid (PFOA) and its salts, Perfluorooctane sulfonate (PFOS) and its salts. Comment period closes April 4, 2016.

Notice of Extension of the Public Comment Period for Notice of Intent to List: Furfuryl Alcohol.  Comment period closed September 30, 2015.