What is a cross-connection in the context of water supply?

A cross-connection refers to an actual or potential link between drinking water and a contamination source. This concept is crucial for maintaining the safety and integrity of a potable water supply. Cross-connections pose a significant risk because, if a contamination source—such as sewage, chemicals, or industrial waste—were to enter the drinking water system, it could lead to serious public health issues, including outbreaks of waterborne diseases.

The identification and prevention of cross-connections are essential components of water supply management. Water utilities often implement rigorous testing and backflow prevention measures to eliminate these connections and ensure that the drinking water remains uncontaminated. Understanding this concept helps water supply professionals create safer systems and prevent potential health hazards that may arise from contaminated water sources.