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Exposure Research

The DEARS Data Analysis Workshops: Summary of Findings and Discussions

Posted: April 29, 2011

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In October and November 2010, EPA researchers conducted two workshops to discuss data collected in EPA’s Detroit Exposure and Aerosol Research Study (DEARS). Their findings are summarized in EPA Report 600/R-11/048. The DEARS study was conducted from 2004-2007.

The workshops were held to discuss the data analysis efforts that took place from 2008-2010. Scientists also discussed possible research areas in which data collected in DEARS could prove valuable.

Communities often rely on local air quality monitors to determine pollution levels in their areas. However, it is unclear whether these give accurate representations of local populations’ actual pollution exposures. The DEARS study was conducted to give researchers a better understanding of the relationship between community air quality levels and actual human and environmental exposures.

DEARS involved three years of data collection and 145 participants, resulting in 36,000 individual exposure measurements. The study had six major goals:

  • Characterize spatial and temporal relationships between pollutants;
  • Determine human exposure factors;
  • Determine environmental exposure factors;
  • Develop enhanced human exposure models;
  • Establish source contributions; and
  • Investigate multi-pollutant relationships.

Final Document:
The DEARS Data Analysis Workshops: Summary of Findings and Discussions


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