Exposure assessment is the process of evaluating how much of a particular substance, such as a chemical or biological agent, individuals or populations come into contact with over a specific period. This assessment helps identify potential health risks associated with exposure to harmful agents in various environments, including workplaces, homes, and natural settings. The assessment typically involves measuring the concentration of the substance in the environment and estimating the duration and frequency of exposure. It can include methods like air sampling, water testing, and surveys to gather data on behaviors and practices that may influence exposure levels.