How deep are wells defined as deep wells?

Deep wells are defined based on the depth at which groundwater is accessed, typically distinguishing them from shallow wells. In many contexts, deep wells are considered to be those that penetrate significantly deeper into the ground, reaching aquifers that are less susceptible to surface contamination and can provide a more consistent and reliable water source. In general, the depth of a deep well is often recognized to start at around 25 feet, as this distance tends to safely reach water tables that are more stable and less affected by seasonal changes or surface pollutants. This is why the definition aligning with a depth of 25 feet is the accepted standard in many regions and industries related to water well drilling and management.