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

What is a potential consequence of allowing backpressure in a distribution system?

1. Water contamination

2. Increased flow rate

3. Improved pressure stability

4. Decreased maintenance needs

The correct answer is: Water contamination

Allowing backpressure in a distribution system can lead to water contamination because it can facilitate the movement of contaminated water from one area of the system back into the clean water supply. This situation often arises when pressure in the distribution system drops or when there are connections to non-potable water sources. When pressure in the system is disrupted, it can create a scenario where water from less desirable sources is drawn back into the system, posing a significant risk to public health by potentially introducing harmful bacteria, chemicals, or other pollutants into the drinking water supply. While backpressure might seem like it could increase flow rates or improve pressure stability, those effects can be deceptive and are often accompanied by negative consequences, such as contamination. Additionally, while decreased maintenance needs might be an advantage in specific contexts, backpressure typically necessitates more rigorous monitoring and potential maintenance issues to ensure water quality and system integrity, countering the idea that maintenance needs would decrease.