What is an exposure point?

• A. The origin of contamination.
• B. The way a contaminant enters the body.
• C. The movement of contaminants in a medium.
• D. The specific location where people may contact a contaminated medium.

Answer: (D)

Exposure point is the location where contact with a contaminant can occur, allowing exposure to happen. In a drinking water context, this is the actual spot where people may come into contact with contaminated water—such as a faucet, a shower, or any outlet where water is consumed or touched. This focuses on where exposure occurs, not where the contaminant originates (source) or how it moves through a medium (transport), or the route by which it enters the body (ingestion, inhalation, or dermal absorption). So, the exposure point is the specific place where people may contact a contaminated medium.