What is the purpose of collecting distribution system samples?

• A. To measure the effectiveness of filtration
• B. To determine treatment plant efficiency
• C. To assess the quality of water at various points in the system
• D. To evaluate the chlorination level

Answer: (C)

Collecting distribution system samples serves the critical purpose of assessing the quality of water at various points throughout the distribution system. This process is essential for ensuring that the water supplied to consumers meets safety and quality standards. By sampling at different locations, operators can detect any changes in water quality due to factors like aging infrastructure, biofilm growth, or contaminant intrusion, which might compromise public health.

When samples are collected, they can reveal essential information about the presence of contaminants, bacteria, and other indicators of water quality, allowing for timely interventions if problems are detected. Understanding the quality at various points helps in identifying potential issues in the distribution network and taking preventive measures to maintain the integrity of the water supply.

While the other options relate to important aspects of water treatment and monitoring, they do not directly capture the primary focus of distribution system sampling. For example, measuring filtration effectiveness is more related to assessing treatment processes at the water plant rather than the distribution system itself. Similarly, treatment plant efficiency pertains specifically to the performance of the water treatment facility. Evaluating chlorination levels, while important for disinfection, is a narrower focus and does not encompass the overall assessment of water quality across the distribution network.