Cross Connection Practice Exam

The primary concern to the water purveyor, when an auxiliary water supply is utilized, or maintained, is to ensure that:

1. Adequate pressure is maintained

2. Backflow protection is provided at the water service connection

3. Water quality is consistently monitored

4. Usage is within regulatory limits

The correct answer is: Backflow protection is provided at the water service connection

The primary concern for the water purveyor when an auxiliary water supply is utilized or maintained is to ensure that backflow protection is provided at the water service connection. This is crucial because an auxiliary water supply can introduce contaminants into the drinking water system if not properly managed. Backflow occurs when there is a reversal of flow in the water distribution system, which can happen due to changes in pressure or other factors. If backflow occurs and proper protection measures, such as backflow preventers, are not in place, water from the auxiliary supply could flow back into the public water system, potentially compromising water quality and safety. Therefore, implementing backflow protection is an essential step to prevent contamination, maintain the integrity of the municipal water supply, and protect public health.