What is the basis for the number of samples to be collected for lead and copper analysis?

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The correct basis for determining the number of samples to be collected for lead and copper analysis is the size of the distribution system. This approach ensures that the sampling reflects the water quality issues across the entire system. Larger distribution systems typically require a greater number of samples to accurately assess the potential for lead and copper contamination, as the variability in water quality can increase with system size.

Sampling based on the distribution system's size allows for a more representative assessment of the water quality. It takes into consideration the number of service connections and the geographical area served, which are critical factors that can influence contaminant levels. By utilizing this method, water systems can identify and address issues more effectively, ensuring compliance with regulatory standards and improving public health outcomes.

Other factors, while they may influence sampling strategies in some contexts, are not as foundational as the system's size in determining the number of samples required for accurate lead and copper analysis.

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