What is a cross-connection in a water distribution system?

A cross-connection in a water distribution system refers specifically to a physical connection between potable (drinkable) water and non-potable (non-drinkable) water systems. This type of connection poses significant health risks because it can allow contaminants from the non-potable source to enter the potable water supply, particularly during events such as a drop in water pressure that may occur in the distribution system.

Preventing cross-connections is a critical aspect of maintaining water quality and protecting public health. Various methods, such as the installation of backflow prevention devices, are used to address the risks associated with cross-connections and ensure the safety of drinking water. Understanding the nature and implications of cross-connections is essential for anyone involved in water distribution management.