Fourth Report, February 2009
The Fourth National Report on Human Exposure to Environmental Chemicals, 2009, (the Fourth Report, 2009) presents data for 212 chemicals. The Fourth Report includes the findings from nationally representative samples for 1999-2004.
The blood and urine samples reported in both publications were collected from participants in CDC's National Health and Nutrition Examination Survey (NHANES), which obtains and releases health-related data from a nationally representative sample in two year cycles.
Download the Fourth Report [PDF - 6.5 MB]
- Executive Summary of the Fourth Report [PDF - 1,045 KB]
- Chemicals in the Updated Tables [PDF - 99 KB]
- Chemical Factsheets
- Biomonitoring Summaries
- SAS Code Example for Calculating Confidence Intervals of Percentiles [TXT - 10 KB]