What is a cross-connection?

A cross-connection is defined as a connection between potable (drinking) water systems and non-potable (non-drinkable) water systems. This connection poses significant risks because it allows for the potential contamination of the potable water supply. For example, if there is a drop in pressure within the potable water system, it can create a vacuum effect that draws potentially contaminated water from the non-potable system into the clean water supply. This is why cross-connections are strictly regulated and require proper backflow prevention devices to protect public health.

Understanding what constitutes a cross-connection is crucial for water distribution operators as it involves ensuring the integrity of the drinking water supply against contamination. It is essential for safeguarding health and preventing waterborne diseases linked to contaminated water supplies.