Fourth national report on human exposure to environmental chemicals
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields



Document Data
Clear All
Clear All

For additional assistance using the Custom Query please check out our Help Page


Fourth national report on human exposure to environmental chemicals

Filetype[PDF-6.36 MB]

Select the Download button to view the document
This document is over 5mb in size and cannot be previewed


  • Alternative Title:
    National report on human exposure to environmental chemicals;4th National report on human exposure to environmental chemicals;
  • Corporate Authors:
  • Description:
    The Fourth National Report on Human Exposure to Environmental Chemicals, 2009 (the Report) provides an ongoing assessment of the exposure of the U.S. population to environmental chemicals by the use of biomonitoring. The Report is cumulative (containing all the results from previous Reports) and provides new data for years 2003- 2004. Data for 75 new environmental chemicals are included for the survey period 2003-2004. The Report website is also the best source for the most recent update of available data.

    In each survey period, most chemicals or their metabolites were measured in blood, serum, and urine samples from random subsamples of about 2500 participants from the National Health and Nutrition Examination Survey (NHANES) conducted by the Centers for Disease Control and Prevention’s (CDC’s) National Center for Health Statistics. NHANES is a series of surveys designed to collect data related to the health and nutritional status of the U.S. population. The blood, serum, and urine exposure measurements presented in the Report were made by CDC’s Environmental Health Laboratory (Division of Laboratory Sciences, National Center for Environmental Health) using mass spectrometry methods.

    The overall purpose of the Report is to provide unique exposure information to scientists, physicians, and health officials to help prevent exposure to some environmental chemicals. Specific public health uses of the exposure information in the Report are: To determine which chemicals get into Americans and at what concentrations; For chemicals with a known toxicity level, to determine the prevalence of people with levels above those toxicity levels (e.g., a blood lead level greater than or equal to 10 micrograms per deciliter [≥ 10 μg/dL]); To establish reference values that can be used by physicians and scientists to determine whether a person or group has an unusually high exposure. This information is especially helpful to identify population groups that merit further assessment of exposure sources or health effects; To assess the effectiveness of public health efforts to reduce exposure of Americans to specific chemicals; To determine whether exposure levels are higher among such potentially vulnerable groups as minorities and children; To track, over time, trends in levels of exposure of the population; To set priorities for research on human health effects.

  • Subjects:
  • Document Type:
  • Place as Subject:
  • Collection(s):
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

  • No Additional Files
More +

Related Documents

You May Also Like

Checkout today's featured content at