What is the basis for the number of samples that must be collected for utilities monitoring for lead and copper?

The number of samples that must be collected for utilities monitoring for lead and copper is based on the population served by the utility. The rationale behind this is to ensure that the sampling accurately reflects the potential exposure to lead and copper in the drinking water of the community. Larger populations typically have a greater number of lead service lines and plumbing materials that can contribute to contamination, making it essential to collect a representative number of samples to assess the water quality effectively.

By determining the sampling size according to the population, utilities can ensure compliance with regulatory standards and provide a reliable assessment of the levels of lead and copper in their drinking water. This approach helps in identifying areas of concern and addressing public health risks effectively. It also aligns with the guidelines provided by regulatory bodies, which emphasize the importance of a representative sample size based on the number of individuals served.