Air

OEHHA is responsible for conducting health risk assessments of chemical contaminants found in air, including those identified as toxic air contaminants or on the list of chemicals under the “Hot Spots” Information and Assessment Act. Assessments include development of Cancer Potency Factors to assess the cancer risk from carcinogens in air, and development of Reference Exposure Levels to assess noncancer health impacts. OEHHA has developed and updates risk assessment guidance for use in site-specific risk assessments under the Air Toxics Hot Spots program. OEHHA also makes health-based recommendations to the Air Resources Board for Ambient Air Quality Standards. Recent legislation, the Children's Environmental Health Protection Act, requires OEHHA to explicitly consider infants and children in evaluating health risks of air pollutants. OEHHA is evaluating current risk assessment methods for their adequacy to protect children.

OEHHA also conducts epidemiological investigations of the health effects of criteria air pollutants. Such investigations include the health impacts on sensitive subpopulations such as children and the elderly. For example, OEHHA conducted an evaluation of the impacts of traffic-related pollutants on children. Specifically, the relationship between respiratory health of children and proximity of their schools to heavily-traveled roadways including measured exposure to traffic-related pollutants was analyzed.

OEHHA also evaluates health effects of chemicals commonly found in indoor air. OEHHA participates in a number of inter-Agency activities designed to evaluate indoor air quality health issues and to move California toward safer indoor air quality.

OEHHA provides health-related assistance to the Air Resources Board, air pollution control districts, local health officers and environmental health officers.

Reports, Notices, Documents

Feb 25, 2015: Criteria Pollutants
Details on OEHHA's work on health-based recommendations for California's Ambient Air Quality Standards on the common "criteria" air pollutants.
Feb 25, 2015: Health Studies of Criteria Air Pollutants
A general overview of the Criteria Air Pollutants (PM2.5, course particles, nitrogen dioxide and ozone) is provided, with links to health studies.
Dec 10, 2014: OEHHA Presentation on a PBPK Model of Blood Lead and Worker Exposure
In October 2013, to better understand workplace exposures, OEHHA developed a physiologically-based pharmacokinetic (PBPK) model describing the relationship between airborne lead and blood levels in workers and released to the public.  An Errata sheet with a correction to Table A-2 was added to this document.

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