What should be assessed when determining the number of potential water well users in a contaminated area?

When determining the number of potential water well users in a contaminated area, it is essential to assess the number of people who use any wells in proximity. This evaluation is crucial because it directly identifies individuals or households that may be relying on groundwater sources that could be affected by contamination. Understanding who uses these wells allows for a more accurate assessment of potential health risks and necessary interventions.

The proximity of wells is particularly important as it helps gauge the extent of exposure risk from contaminants, especially if the source of contamination is known or suspected to affect groundwater. By focusing on actual users of these water sources, authorities can better target public health initiatives, monitoring, and remediation efforts to protect the community's health and ensure safe drinking water options are available.

This approach emphasizes the importance of mapping actual usage of water resources rather than broader data points like business licenses, house age, or agricultural types, which do not directly indicate who is at risk from well contamination.