The science of biomonitoring seeks to assess the body burdens of commercial chemicals on the general population. Since 2001, CDC has issued three National Reports on Human Exposure to Environmental Chemicals. The data in each of these is based upon a CDC biennial National Health and Nutrition Examination Survey (NHANES). These have reported on the assessments of as many as 158 chemicals in human specimens such as blood and urine. The CDC has also, since 2002, provided funds to support the development of state biomonitoring programs. The availability of these data has been met by many divergent opinions among the stakeholder community as to how biomonitoring data should be interpreted and used. ACI supports the development of science-based exposure information and biomonitoring programs and the responsible and appropriate use of biomonitoring information in risk assessments of chemicals that are relevant to the cleaning products industry.