What is a potential risk in having cross-connections in a water distribution system?

Having cross-connections in a water distribution system creates a significant risk due to the potential for backflow of contaminated water. A cross-connection allows non-potable water sources, which may contain hazardous substances or pathogens, to mix with the clean drinking water supply.

When backflow occurs, perhaps due to a drop in pressure in the distribution system or another change in flow dynamics, this contaminated water can reverse its flow and enter the potable water supply. This presents a severe public health risk, as individuals consuming the water might unknowingly ingest harmful contaminants that could lead to illness or health complications.

Establishing protective measures against backflow, such as backflow preventers and maintaining proper cross-connection control practices, is essential to ensure safe drinking water and protect public health from these potential hazards.