What does "cross-connection" mean in water systems?

A cross-connection refers to a physical connection or potential connection between a safe drinking water supply (potable water) and a source of contamination (non-potable source). This term is significant in the context of water systems because it poses a risk of contamination that can occur if backflow happens, allowing unsafe water to flow back into the potable water supply.

Understanding cross-connections is crucial for maintaining water quality and public health. Various regulations and plumbing codes are designed to prevent such connections, ensuring that drinking water remains free from pollutants and pathogens. Recognizing the definition of cross-connection is essential for anyone involved in water system management, plumbing, or water quality assurance to mitigate risks and protect consumer health.