What is the function of a Cross connection control device?

• A. To measure the amount of water used by a household
• B. To connect two or more public water supply systems
• C. To prevent contaminants from entering the water supply system
• D. To enhance the treatment process of drinking water

Answer: (C)

A cross connection control device serves the critical function of preventing contaminants from entering the drinking water supply system. This is essential for protecting public health, as cross connections can potentially allow non-potable water or harmful substances to mix with the potable water supply, leading to serious health risks. The design of these devices ensures that any backflow of contaminated water is effectively blocked, maintaining the integrity of the potable water system.

In contrast, measuring water usage pertains to water meters, which track consumption rather than addressing safety from contamination. Connecting multiple public water supply systems is related to infrastructure and distribution rather than contamination prevention. Enhancing the treatment process involves methods to improve water quality, but it does not specifically address the critical need for cross connection control, which is focused on safeguarding drinking water from external sources of contamination.