Why should drinking water distribution system sampling plans be developed?

Developing drinking water distribution system sampling plans is crucial primarily to ensure proper sampling locations are used. This is important because the locations where samples are taken can significantly impact the accuracy and reliability of water quality testing results. By strategically determining where to sample—such as at the end of dead-end lines, areas with known contamination risks, or locations that reflect the overall system—operators can effectively monitor for contaminants and assess water quality throughout the distribution system.

Proper sampling locations help capture the variations that may occur due to factors such as water age, temperature, and the presence of biofilms or sediments. This ensures that the data collected accurately reflects the conditions of the water supplied to consumers, thus helping to protect public health and meet regulatory standards.

While reducing costs, increasing public participation, or eliminating reporting requirements may be beneficial in other contexts, they do not directly address the essential goal of ensuring the integrity and safety of drinking water through effective sampling practices.