Texas Commission on Environmental Quality (TCEQ). Class C Water License Exam

A cross connection refers to which of the following?

1. A safe drinking water supply

2. A physical connection between a potable water supply and a non-potable source

3. A method of testing water quality

4. A type of water treatment process

The correct answer is: A physical connection between a potable water supply and a non-potable source

A cross connection is defined as a physical connection between a potable water supply and a non-potable source. This type of connection poses a significant risk because it allows for the potential contamination of the safe drinking water supply. When there is a pressure drop in the potable system, it may create a backflow situation where non-potable water can flow into the drinking water supply, leading to health hazards. Understanding the concept of cross connections is crucial for maintaining public health and safety. It is essential for water operators and individuals responsible for water systems to recognize and prevent cross connections to ensure that potable water remains uncontaminated. Regular inspections and the implementation of backflow prevention devices are necessary practices in water system management to mitigate these risks.