National Report on Human Exposure to Environmental Chemicals

Updated Tables, March 2021

This Updated Tables, March 2021, presents nationally representative and cumulative biomonitoring data gathered from 1999-2000 through 2015-2016. It also includes all the summary data from each previous National Report on Human Exposure to Environmental Chemicals and each of the previous Updated Tables.  The Updated Tables are represented in four separate volumes: Volume One (1999-2010) and Volume Two (2011-2016) contain data tables for chemicals measured in the general U.S. population, Volume Three contains data tables for persistent organic pollutants and pesticides measured in pooled samples, and Volume Four contains data tables for a special sample of adult cigarette smokers and nonsmokers. For additional details, see the Introduction section located in the beginning of each Volume.

August 2, 2021 Update

On August 2, 2021, data tables for Urinary N-Acetyl-S-(3-hydroxypropyl-1-methyl)-L-cysteine (NHANES variable name: URXPMM) were removed from the Updated Tables, March 2021. A correctable systematic bias was discovered in the URXPMM measurement impacting NHANES cycles 2005-06, 2011-12, 2013-14, and 2015-16. The location of tables temporarily removed from the Updated Tables, March 2021 and associated NHANES cycle(s) are:

  • Volume One: pp 653-654 (NHANES 2005-06)
  • Volume Two: pp 487-488 (NHANES 2011-16)
  • Volume Four: pp 393-396 (NHANES 2011-16)

Corrected tables will be added when updated NHANES data files are available.

What's New?

Early Release: Per- and Polyfluorinated Substances (PFAS) Tables, NHANES 2011-2018

Ethylene Oxide Hemoglobin Adducts

Search Biomonitoring Data on Tracking Portal

Fourth Report, February 2009

2009 Report Cover

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, 2009 pdf icon[PDF – 7 MB]

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Page last reviewed: August 2, 2021