What is an example of a cross connection?

• A. A pipe connecting two wells
• B. A hose leading directly into a pond
• C. A garden hose left in a swimming pool
• D. A direct link between a municipal water supply and a private well

Answer: (D)

A direct link between a municipal water supply and a private well is a clear example of a cross connection. This situation creates a potential pathway for contaminants to enter the public water supply. When a private well is connected to the municipal water system, variations in water pressure can allow water from the well, which may not be treated or tested to the same standards as the municipal supply, to flow back into the mainline. This is particularly concerning if the private well is not properly maintained or if it is contaminated.

Cross connections are significant because they can compromise the safety and quality of drinking water, which is why regulations and backflow prevention measures are put in place. Understanding cross connections is crucial for water operators to ensure that effective measures are in place to protect water supplies from contamination.