Project at a Glance

Title: Determination of elemental carbon and organic carbon concentrations during the Southern California Children's Health Study, 1999-2001.

Principal Investigator / Author(s): Seinfeld, Johnynn; Salmon, L; Mayo, Paul; Cass, Glen

Contractor: California Institute of Technology

Contract Number: 01-309

Research Program Area: Health & Exposure

Topic Areas: Health Effects of Air Pollution, Vulnerable Populations


Since 1994, a network of air monitoring sites have been operating as part of the Southern California Children’s Health Study, a large epidemiological investigation of the long-term effects of air pollutant exposure on respiratory disease within a population of more than 5600 California school children. We previously reported the results of chemical analysis of particulate organic carbon (OC) and elemental carbon (EC) samples taken at twelve air monitoring sites in the southern half of the state of California over the 5-year period 1994-1998. Samples for the Children’s Health Study continue to be collected over consecutive two week averaging times with sample collection scheduled to end in June, 2004 marking completion of the 10 year study. This report presents the particulate organic carbon (OC) and elemental carbon (EC) concentrations measured during the intermediate three years of this monitoring program (1999-2001). Annual average PM10-equivalent elemental (black) carbon particle concentrations range from 0.05 - 1.74 µg m

For questions regarding this research project, including available data and progress status, contact: Research Division staff at (916) 445-0753

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