What constitutes a high-hazard cross-connection?

A high-hazard cross-connection is defined as a connection that poses a significant risk of contamination to the potable water supply. Situations that involve hazardous materials, such as sewage, present a clear potential for backflow events where harmful substances can flow back into drinking water systems.

The presence of sewage, for example, introduces pathogens, chemicals, and other harmful substances that could seriously compromise water quality and public health. Therefore, identifying and controlling high-hazard cross-connections is critical in preventing potential contamination.

Understanding this context is crucial for backflow prevention professionals, as they must proactively assess and mitigate risks associated with various types of cross-connections in order to maintain safe drinking water standards.