Biomonitoring is the measurement of contaminants such as pesticides and other chemicals in the body. It is accomplished by analyzing samples from the body such as urine, blood, breast milk, saliva, or hair.
Biomonitoring is one of the three main pillars of Environmental Public Health Tracking: hazard tracking, exposure tracking (biomonitoring), and health outcome tracking. Biomonitoring is important as it can give the public, scientists, and other stakeholders information about actual exposures – measures of which contaminants are entering the human body – as opposed to just information about contaminants which are present in the general environment (hazard tracking).