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

CDC routinely updates summary measurements for its National Health and Nutrition Examination Survey (NHANES) biomonitoring data in Updated Tables to the National Report on Human Exposure to Environmental Chemicals (National Report).

CDC is providing these per- and polyfluorinated substances (PFAS) serum measurements as a standalone resource in advance of the next scheduled National Report update to aid federal, state, and local public health agencies, and others, currently investigating PFAS.

These tables present biomonitoring data gathered in up to four cycles of CDC’s NHANES: survey years 2011-12, 2013-14, 2015-16, 2017-18.  The NHANES survey is designed to provide nationally representative information for the general U.S. population.

PFAS were measured in serum from random one-third subsamples of NHANES participants. The Environmental Health Laboratory in CDC’s National Center for Environmental Health used mass spectrometry methods to make these measurements.

The measurement of an environmental chemical in a person’s blood is an assessment of exposure; it does not by itself mean that the chemical causes disease or an adverse effect.  Research studies, separate from these data, are required to determine which blood concentrations are safe and which ones could be associated with disease or an adverse effect.

Please direct any questions about this information to CDC-INFO: https://wwwn.cdc.gov/dcs/contactus/form

Notes and Additional Resources

For more information about PFAS, please see the following factsheet: https://www.cdc.gov/biomonitoring/PFAS_FactSheet.html

Statistics include geometric means and selected percentiles, with 95 percent confidence intervals around each estimated statistic. Percentiles describe the shape of the distribution. For all chemicals, the 50th, 75th, 90th, and 95th percentiles are presented.

Biomonitoring is the assessment of human exposure to chemicals by measuring the chemicals, their metabolites, or adducts in human specimens such as blood, serum, or urine.

Data Tables

Page last reviewed: December 16, 2021