Water Distribution Grade 1 Certification Practice Exam

What is the regulatory definition of a cross-connection in a water supply?

1. A connection with a well

2. A connection with another public system

3. A connection leading to contamination

4. A connection to any source of water

The correct answer is: A connection leading to contamination

The regulatory definition of a cross-connection refers specifically to a connection leading to contamination. This implies that it is a situation where potable (drinking) water can potentially be contaminated by non-potable water or pollutants due to a direct link. The risk is particularly significant in cross-connections, as they can allow contaminants to flow back into the public water supply, posing health risks to consumers. Considering the context of potential contamination, this definition is pivotal for ensuring safe drinking water. Regulations and guidelines typically focus on preventing such situations to protect public health, which is why identifying and controlling cross-connections is a critical task for water system professionals. While connections with wells, other public systems, or any water sources might suggest some form of relationship to the water supply, they do not specifically address the concern of contamination or the health implications that a cross-connection presents. Thus, the definition that highlights the risks associated with contamination is the most accurate in a regulatory context.