The National Human Monitoring Program (NHMP) identifies concentrations of specific chemicals in human tissues, including toxicologic testing and risk assessment determinations. This volume evaluates the current activities of the NHMP; identifies important scientific, technical, and programmatic issues; and makes recommendations regarding the design of the program and use of its products.

Biomonitoring—a method for measuring amounts of toxic chemicals in human tissues—is a valuable tool for studying potentially harmful environmental chemicals. Biomonitoring data have been used to confirm exposures to chemicals and validate public health policies. For example, population biomonitoring data showing high blood lead concentrations resulted in the U.S. Environmental Protection Agency's (EPA's) regulatory reduction of lead in gasoline; biomonitoring data confirmed a resultant drop in blood lead concentrations. Despite recent advances, the science needed to understand the implications of the biomonitoring data for human health is still in its nascent stages. Use of the data also raises communication and ethical challenges. In response to a congressional request, EPA asked the National Research Council to address those challenges in an independent study. Human Biomonitoring for Environmental Chemicals provides a framework for improving the use of biomonitoring data including developing and using biomarkers (measures of exposure), research to improve the interpretation of data, ways to communicate findings to the public, and a review of ethical issues.

Over the past decade, advances in laboratory technology have provided new tools for measuring a broad range of chemicals in human tissues -- tools that can help researchers & health officials assess how much of a chemical has been absorbed in the body & provide more accurate measure. of exposure to relate to potential health risks. This report reviews efforts to collect & use such information at both the state & Federal levels. It: determines the extent to which state & Federal agencies -- in particular, HHS & EPA -- collect human exposure data on potentially harmful chemicals, including data to identify at-risk populations; & identifies the barriers hindering further progress in such efforts.