What is an exposure route?

• A. The emission from a source.
• B. The way a contaminant enters or contacts the body, such as ingestion, inhalation, or dermal contact.
• C. The receptor population.
• D. The dispersion of contaminants.

Answer: (B)

Exposure route is the path by which a contaminant actually reaches or contacts the body. It describes how the substance enters or touches a person, such as ingestion from drinking water, inhalation from breathing in contaminated air, or dermal contact from skin exposure. This route is what determines how the dose is received and is essential for assessing risk and planning controls in water surveillance. Other terms refer to different aspects: emission is how a contaminant is released from a source, dispersion is how it spreads through the environment, and the receptor population is the people who might be exposed.