Exposure Factors Program

The development of the latest version of the Exposure Factors Handbook 1997(EPA/600/P-95/Fa, Fb, and Fc) has brought to light the need for a more comprehensive program that addresses issues related to exposure factors. The need for the most up-to-date and accurate data on exposure factors used in assessing exposure to contaminants in the environment is of high priority to exposure assessors throughout the U.S. The completion of the Exposure Factors Handbook has only been the first step in fulfilling this need. Many data needs have been identified and follow up research is underway to address some of the data gaps. This web page is intended to provide a focal point where the most current information and data on exposure factors can be found.

Exposure Factors Handbook

Recent Releases

Under Review

Exposure Factors
Handbook -
2009 Update
(External Review Draft)

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Final Report


CSEFH - Sep '08

• Exposure Factors Handbook - 2009 Update (External Review Draft)
• Exposure Factors Handbook Aug 1997
• Child-Specific Exposure Factors Handbook 2008 Update (Final)
• Highlights of the Child-Specific Exposure Factors Handbook (2009)
• Guide to Current Literature
• Frequently Asked Questions

Exposure Factors Research

• Aging Workshop Report
• Exposure Factors Distributions
• Exposure Scenarios
• Food Intake Analysis
• Fat Intake Analysis
• Guidance on Selecting Age Groups for Children Studies
• Human Ventilation Rates
• Soil Intake Rates for both Adults and Children
• Soil Intake Rates Based on Arsenic in Urine
• Soil Ingestion Colloquium - Appendix

Additional Sources

• CSFII Analysis of Food Intake Distributions
• Sociodemographic Data
• Indoor Air Exposures
• Exposure Factors Finder CD-ROM