What occurrence defines a cross connection?

A cross connection is defined as a situation where potable (drinking) water comes into contact with non-potable (non-drinking) water, which can pose serious health risks. This can happen when there is a failure in the proper systems designed to keep these two types of water separate.

In the context of food safety, ensuring that drinking water remains uncontaminated is crucial because any backflow or contamination could lead to the spread of waterborne diseases. Therefore, a cross connection can lead to significant health hazards if non-potable water were to enter the potable water supply, allowing contaminants to affect food safety and public health.

The other scenarios, while relevant to food safety, do not represent cross connections in the context of water supply. They relate more to cross-contamination in food handling, which refers to the transfer of harmful microorganisms from one food item to another or from surfaces to food. Understanding these distinctions helps reinforce the importance of maintaining a safe and sanitary environment in food establishment operations.